作者:Chitti Subrahmanyam、Battula Venkateswara Rao、Robert S Ward、Michael B Hursthouse、David E Hibbs
DOI:10.1016/s0031-9422(98)00705-5
日期:1999.5
Steviol and five new diterpenes have been isolated from the outer layer of the root bark of Bruguira gymnorhiza Lam of the Andaman and Nicobar Islands. They are ent-kaur-16-en-13-hydroxy-19-al; 15(S)-isopimar-7-en-15,16-diol, ent-kaur-16-en-13.19-diol, methyl-ent-kaur-9(11)-en-13,17-epoxy-16-hydroxy-19-oate; 1 beta, 15(R)-ent-pimar-8(14)-en-1,15,16-triol. Their structures were established by means of spectral studies, chemical reactions and, in case of the last compound, by X-ray analysis. (C) 1999 Elsevier Science Ltd. All rights reserved.