
Additional Names: Etamycin A; neoviridogrisein IV; viridogrisein
Percent Composition: C 60.12%, H 7.11%, N 12.75%, O 20.02%
Literature References: Monocyclic peptide lactone antibiotic produced by Streptomyces griseus and allied Streptomyces spp., which shows activity vs gram positive bacteria, Mycobacterium tuberculosis and some fungi. Obtained together with griseoviridin. Production and isoln: B. Heinemann et al., Antibiot. Annu. 1954-55, 728; Q. R. Bartz et al., ibid. 777. Pharmacology: H. L. Dickison et al., ibid. 733. Chemical studies: T. H. Haskell et al., ibid. 784. Biological studies: J. Ehrlich et al., ibid. 790. Structure: Sheehan et al., J. Am. Chem. Soc. 80, 3349 (1958). Confirmation of structure: Arnold et al., J. Chem. Soc. 1958, 4466. Prodn with griseoviridin: Q. R. Bartz et al., US 3023204 (1962 to Parke, Davis). Total synthesis: Sheehan, Ledis, J. Am. Chem. Soc. 95, 875 (1973). Mode of action: Garcia-Mendoza, Biochim. Biophys. Acta 97, 94 (1965). Mass spectra data: Rozynov et al., Zh. Obshch. Khim. 39, 891 (1969). Prodn of congeners by S. griseoviridus: C. Chopra et al., J. Antibiot. 32, 392 (1979). Biosynthetic studies of neoviridogriseins, homologs of etamycin: Y. Akumura et al., ibid. 575, 1002, 1130.
Additional Names: Potassium sulfocarbonate; potassium trithiocarbonate
Percent Composition: C 6.44%, K 41.95%, S 51.61%
Literature References: Monograph: K. N. Johri, Chemical Analysis without H2S using Potassium Trithiocarbonate (Asia Pub., New York, 1963) 107 pp.
Percent Composition: I 90.69%, K 9.31%
Literature References: Monohydrate prepd by adding the stoichiometric amount of iodine to a hot soln of KI and cooling to 0°: H. L. Wells, H. L. Wheeler, Z. Anorg. Allg. Chem. 1, 453 (1892); H. W. Foote, W. C. Chalker, J. Am. Chem. Soc. 39, 565 (1908). Prepn of anhydrous: N. S. Grace, J. Chem. Soc. 1931, 594.
CAS Name: Tetrafluoroethene
Additional Names: perfluoroethene; TFE
Percent Composition: C 24.02%, F 75.98%
Literature References: Monomer of the plastic, polytetrafluoroethylene, q.v. Prepn: O. Ruff, O. Bretschneider, Z. Anorg. Allg. Chem. 210, 173 (1933). Structural study: T. T. Broun, R. L. Livingston, J. Am. Chem. Soc. 74, 6084 (1952). Physical properties: M. M. Renfrew, E. E. Lewis, Ind. Eng. Chem. 38, 870 (1946). Addition reactions: D. D. Coffman et al., J. Org. Chem. 14, 747 (1949). Thermodynamics and kinetics of mfr by pyrolysis of chlorodifluoromethane: P. B. Chinoy, P. D. Sunavala, Ind. Eng. Chem. Res. 26, 1340 (1987). Review of mfr: Y. Venkateswarlu, P. S. Murti, Chem. Process. Eng. 4, 25-36 (1970); of chemistry: M. Saijwani, Dinkar, Labdev J. Sci. Tech. 9-A, 1-12 (1971); of toxicology: G. L. Kennedy, Jr., Crit. Rev. Toxicol. 21, 149-170 (1990).
CAS Name: 1-Methyl-6-phenyl-1H-imidazo[4,5-b]pyridin-2-amine
Additional Names: 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine
Percent Composition: C 69.62%, H 5.39%, N 24.98%
Literature References: Most abundant of the mutagenic heterocyclic amines found in well-cooked meat and fish. Isoln from fried ground beef: J. S. Felton et al., Carcinogenesis 7, 1081 (1986). Synthesis: M. G. Knize, J. S. Felton, Heterocycles 24, 1815 (1986); T. Choshi et al., J. Org. Chem. 58, 7952 (1993); F. S. Bavetta et al., Tetrahedron Lett. 44, 7793 (1997). Mutagenicity in Chinese hamster ovary cells: L. H. Thompson et al., Mutagenesis 2, 483 (1987). Evaluation of carcinogenic risk: IARC Monographs 56, 229-242 (1993). Review of bioavailability, content in foods, metabolism: N. J. Gooderham et al., Br. J. Clin. Pharmacol. 42, 91-98 (1996). Correlation of dietary intake with breast cancer risk: R. Sinha et al., J. Natl. Cancer Inst. 92, 1352 (2000).
CAS Name: (2R)-3,4-Dihydro-2,5,7,8-tetramethyl-2-[(4R,8R)-4,8,12-trimethyltridecyl]-2H-1-benzopyran-6-ol
Additional Names: (+)-2,5,7,8-tetramethyl-2-(4',8',12'-trimethyltridecyl)-6-chromanol; R...
Literature References: Most bioactive of the naturally occurring forms of vitamin E, q.v. Richest sources are green vegetables, grains, and oils, particularly palm, safflower and sunflower oils. Isoln from wheat germ: H. M. Evans et al., J. Biol. Chem. 113, 319 (1936). Structure: E. Fernholz, J. Am. Chem. Soc. 59, 1154 (1937); 60, 700 (1938). Synthesis of dl-form: P. Karrer et al., Helv. Chim. Acta 21, 520, 820 (1938); F. Bergel et al., J. Chem. Soc. 1938, 1382. Distillation from vegetable oils and prepn of esters: J. G. Baxter et al., J. Am. Chem. Soc. 918 (1943). Prepn of crystalline natural form: C. D. Robeson, ibid. 1660; of crystalline acetate: idem, ibid. 64, 1487 (1942). Abs config of natural a-tocopherol: H. Mayer et al., Helv. Chim. Acta 46, 963 (1963). Stereoselective synthesis: K.-K. Chan et al., J. Org. Chem. 43, 3435 (1978). Total synthesis of all 8 stereoisomers: N. Cohen et al., Helv. Chim. Acta 64, 1158 (1981). Clinical trial in Alzheimer's disease: M. Sano et al., N. Engl. J. Med. 336, 1216 (1997); to improve immune function in healthy elderly: S. N. Meydani et al., J. Am. Med. Assoc. 277, 1380 (1997). Review of bioavailability from vitamin E supplements: M. G. Traber, BioFactors 10, 115-120 (1999). Review of clinical trials in heart disease: W. A. Pryor, Free Radical Biol. Med. 28, 141-164 (2000).
CAS Name: b,b-Carotene
Trademarks: Carotaben (Hermal); Provatene (Microbio); Solatene (Roche)
Percent Composition: C 89.49%, H 10.51%
Literature References: Most important of the provitamins A. Widely distributed in the plant and animal kingdom. In plants it occurs almost always together with chlorophyll. Isoln from carrots: Willstätter, Escher, Z. Physiol. Chem. 64, 47 (1910); Kuhn, Lederer, Ber. 64, 1349 (1931); Barnett et al., US 2848508 (1958). Chromatography: Karrer, Walker, Helv. Chim. Acta 16, 641 (1933). Structure: Willstätter, Mieg, Ann. 355, 1 (1907); Zechmeister et al., Ber. 61, 566 (1928); 66, 123 (1933); Karrer et al., Helv. Chim. Acta 12, 1142 (1929); 13, 1084 (1930); 14, 1033 (1931); Kuhn, Brockmann, Ber. 65, 894 (1932); 66, 1319 (1933); 67, 1408 (1934); Ann. 516, 95 (1935). Crystal structure: Sterling, Acta Crystallogr. 17, 1224 (1964). Synthesis: Milas et al., J. Am. Chem. Soc. 72, 4844 (1950); Karrer, Eugster, Compt. Rend. 250, 1920 (1950); Inhoffen et al., Chem. Ztg. 74, 285, 309 (1950); Surmatis, Ofner, J. Org. Chem. 26, 1171 (1961); Rüegg et al., Helv. Chim. Acta 44, 985 (1961); Bestmann et al., Ann. 1973, 760; Fischli, Mayer, Helv. Chim. Acta 58, 1584 (1975). Industrial mfg procedure: Isler et al., Helv. Chim. Acta 39, 249 (1956); Isler et al., US 2917539 (1959 to Hoffmann-La Roche). Microbial production by Choanephora trispora: Zajic, US 2959521; US 2959522 and US 3128236 (1960, 1960 and 1964, all to Grain Processing); Miescher, US 3001912 (1961 to C.S.C.). Review: Fleming, Selected Organic Syntheses (John Wiley, London, 1973) pp 70-74.
CAS Name: (3b,22E)-Ergosta-5,7,22-trien-3-ol
Additional Names: ergosta-5:6,7:8,22:23-trien-3-ol; ergosterin
Percent Composition: C 84.78%, H 11.18%, O 4.03%
Literature References: Most important of the provitamins D. Usually obtained from yeast which synthesizes it from simple sugars such as glucose. Damp yeast yields about 2.5% ergosterol, the variety of the yeast being very important. Isoln procedure: Green et al., US 3006932 (1961 to Vitamins Ltd.). When irradiated with uv light, ergosterol develops powerful vitamin D2, q.v., activity. Askew et al., in England and Windaus and collaborators in Germany isolated the antirachitic vitamin D2. The main irradiation products of ergsterol are lumisterol®tachysterol®vitamin D2. Structure: Chuang, Ann. 500, 270 (1933). Oxidation products: Fuerst, Arch. Pharm. 300, 144 (1967).
CAS Name: 3,7-Dimethyl-1,6-octadien-3-yl acetate
Trademarks: Bergamol (Synfleur)
Percent Composition: C 73.43%, H 10.27%, O 16.30%
Literature References: Most valuable constituent of bergamot and lavender oils, also found in many other volatile oils.
CAS Name: (aR)-4-[(1aa,6a,10ba)-1,1,-Difluoro-1,1a,6,10b-tetrahyrodibenzo[a,e]cyclopropa[c]cyclohepten-6-yl]-a-[(5-quinolinyloxy)methyl]-1-piperazineethanol
Additional Names: (2R)-anti-5-[3-[4-...
Literature References: Multidrug resistance (MDR) modulator; selective inhibitor of P-glycoprotein (P-gp), q.v. Prepn: J. R. Pfister, D. L. Slate, WO 9424107; eidem, US 5654304 (1994, 1997 both to Syntex); J. R. Pfister et al., Bioorg. Med. Chem. Lett. 5, 2473 (1995). Improved synthesis: C. J. Barnett et al., J. Org. Chem. 69, 7653 (2004). Effect on multidrug resistant cell lines: L. J. Green et al., Biochem. Pharmacol. 61, 1393 (2001). Specificity for P-gp: R. L. Shepard et al., Int. J. Cancer 103, 121 (2003). Clinical pharmacology and pharmacokinetics in patients with advanced malignancies: E. H. Rubin et al., Clin. Cancer Res. 8, 3710 (2002). Effect on pharmacokinetics of doxorubicin: S. Callies et al., Cancer Chemother. Pharmacol. 51, 107 (2003).
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