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Note | Regular issue | Vol 48, No. 5, 1998, pp.1003-1013
Published online, 1st January, 1970
DOI: 10.3987/COM-98-8121
Structures of Two New Cyclolanostanol Xylosides, Cimiacerosides A and B

Akiko Kusano, Masayuki Takahira, Makio Shibano, Toshio Miyase, Toru Okuyama, and Genjiro Kusano*

*Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1094, Japan

Abstract

A new cyclolanostanol xyloside, cimiaceroside A, was isolated from Cimicifuga acerina (Miyagi) and Actaea asiatica, and another, cimiaceroside B, from C. simplex and C. acerina (Oki) respectively. The absolute stereostructures of cimiacerosides A and B were determined as 20(S),22(R),23(S),24(R)-16β:23;22:25-diepoxy-3β,23,24-trihydroxy-9,19-cyclolanost-7-ene-3-O-β-D-xylopyranoside and 20(S),22(R),23(S),24(R)-16β:23;22:25-diepoxy-3β,23,24-trihydroxy-9,19-cyclolanostane-3-O-β-D-xylopyranoside on the basis of chemical and spectral data, and with the aid of a new version of Mosher’s method.