参考文献:10.1248/cpb.31.1567 摘要:KATAI M, TERAI T, MEGURI H. Triterpenoids of the bark of Pieris japonica D. Don (Japanese name: asebi). II. 13C Nuclear magnetic resonance of the .GAMMA.-lactones of ursane- and oleanane-type triterpenes. Chem. Pharm. Bull. 1983;31(5):1567–71. doi: 10.1248/cpb.31.1567.