CAS: 22804-49-5; 1-Hydroxy-2,3,5-Trimethoxyxanthone

上下游产品

diazomethane 1,2,3-trihydroxy-5-methoxyxanthone

📜Acetic Acid (2S,3R,4S,5R,6R)-4,5-Diacetoxy-6-Acetoxymethyl-2-(2,3,5-Trimethoxy-9-Oxo-9H-Xanthen-1-Yloxy)-Tetrahydro-Pyran-3-Yl Ester置于盐酸体系中,用 甲醇 用作溶剂,化学反应 0.5H,反应生成1-羟基-2,3,5-三甲氧基-9H-氧杂蒽-9-酮
参考文献:来自 Halenia Elliptica 的两种呫吨酮糖苷
标题:来自 Halenia Elliptica 的两种呫吨酮糖苷
摘要:摘要 从椭圆海莲草全株中分离得到2,3,7-三甲氧基氧杂蒽酮-1-O-葡萄糖苷和2,3,5-三甲氧基氧杂蒽酮-1-O-葡萄糖苷两种新的氧杂苷,并对其进行乙酸酯鉴定.还存在四种游离氧杂蒽酮,1-羟基-2,3,4,7-四甲氧基,1-羟基-2,3,4,5-四甲氧基,1-羟基-2,3,7-三甲氧基和1-羟基-2,3,5-三甲氧基氧杂蒽酮,齐墩果酸和谷甾醇葡萄糖苷.富含氧杂蒽酮糖苷的部分显示出显着的抗阿米巴活性.
Doi:10.1016/s0031-9422(00)98097-X

专利信息

专利号:US-11488613-B2
优先权日:2019-11-13
标 题 :Residual coding method of linear prediction coding coefficient based on collaborative quantization, and computing device for performing the method
发明人：KIM MINJE; Zhen kai; LEE MI SUK; BEACK SEUNG KWON; SUNG JONGMO; LEE TAE JIN; CHOI JIN SOO
权利人:ELECTRONICS & TELECOMMUNICATIONS RES INST; UNIV INDIANA TRUSTEES
摘要:Disclosed are a method for coding a residual signal of LPC coefficients based on collaborative quantization and a computing device for performing the method. The residual signal coding method includes: generating encoded LPC coefficients and LPC residual signals by performing LPC analysis and quantization on an input speech; Determining a predicted LPC residual signal by applying the LPC residual signal to cross module residual learning; Performing LPC synthesis using the coded LPC coefficients and the predicted LPC residual signal; It may include the step of determining an output speech that is a synthesized output according to a result of performing the LPC synthesis.

专利号:US-11456897-B2
优先权日:2018-04-09
标 题:Communication apparatus, method, program, and recording medium
发明人：IWASAKI MOTOYA
权利人:NEC CORP
摘要:A communication apparatus 300 includes a first channel estimating unit 131 configured to perform a first channel estimation at a first frequency using a reference signal included in a signal sequence, a first weight information generating unit 133 configured to generate first weight information based on the first channel estimation, a synthesis processing unit 135 configured to perform weighted synthesis processing based on the first weight information, a second channel estimating unit 137 configured to perform a second channel estimation at a second frequency higher than the first frequency using a reference signal included in the signal sequence subjected to the weighted synthesis processing, a second weight information generating unit 139 configured to generate second weight information based on the second channel estimation, and a demodulation processing unit 141 configured to perform demodulation processing of the signal sequence subjected to the weighted synthesis processing based on the second weight information.