Reference

A new antibacterial diterpene from Rabdosia macrocalyx - macrocalyxoformin A

A new antibacterial diterpene from Rabdosia macrocalyx - macrocalyxoformin A. Wang, Zhaoquan; Wang, Xianrong; Dong, Jinguang (Anhui Inst. Med. Sci., Hefei, Peop. Rep. China). Zhongcaoyao, 14(11), 481-5 (Chinese) 1983. CODEN: CTYAD8. ISSN: 0253-2670. DOCUMENT TYPE: Journal CA Section: 11 (Plant Biochemistry) Six cryst.In this article, certain chemicals are used. Some of their cas registry numbers are 83-47-6 and 508-02-1 components were isolated and sepd. from the EtOH ext. of the stem of R. macrocalyx. One of the 6 sepd. cryst. components showed antibacterial activity; further studies by IR, NMR, and mass spectroscopy and derivs. prepn. identified the antibacterial crystal component as I, which was named macrocalyxoformin A. Two of the remaining 5 components were identified as g-sitesterol and oleanolic acid, resp., and the other 3 cryst. components remained unidentified. .

Triterpene glycosides from Climacoptera transoxana

Triterpene glycosides from Climacoptera transoxana. III. Structure of copterosides E and F. Annaev, Ch.; Isaev, M. I.; Abubakirov, N. K.Some commonly used reagents like 465-99-6 and 508-02-1 are used in this experiment. (Inst. Khim. Rastiteln. Veshchestv, Tashkent, USSR). Khim. Prir. Soedin., (5), 596-601 (Russian) 1983. CODEN: KPSUAR. ISSN: 0023-1150. DOCUMENT TYPE: Journal CA Section: 11 (Plant Biochemistry) From aboveground parts of the title plant 2 new triterpene glycosides, copterosides E (I) and F (II) were isolated. They were found to be bisdesmoside glycosides. By chem. methods and spectral anal. it was established that the structure of I is oleanolic acid 3-[O-b-D-xylopyranosyl-(1?2)-O-b-D-xylopyranosyl-(1?4)]-O-b-D-glucur onopyranoside 28-O-b-D-glucopyranoside and that of II is hederagenin 3-[O-b-D-xylopyranosyl(1?2)-O-b-D-xylopyranosyl(1?4)]-O-b-D-glucuro nopyranoside 28-O-b-D-glucopyranoside. .