Online article for Non-subscribers

Pay per view

Heterocycles has a pay-per-view service for Non-subscribers.
You will be able to directly purchase the full text article through PayPal.
Your purchased Paper can be downloaded after the payment is completed.
An e-mail will be sent the URL to download the paper.
If you have any questions, please contact: purchase@heterocycles.com

Price: ¥ 4,320 (Yen only)
Period: This Article can be accessed for 7 days.

Paper | Regular issue | Vol 53, No. 12, 2000, pp.2689-2700
Published online, 1st January, 1970
DOI: 10.3987/COM-00-9033
Mass Spectral Analysis of Cardiac Steroids Isolated from Elaeodendron glaucum

Hiroko F. Kasai,* Ken-ichi Kawai, and Kazutake Shimada

*Faculty of Pharmaceutical Sciences, Hoshi University, 2-4-41 Ebara, Shinagawa-ku, Tokyo 142-8501, Japan

Abstract

The electron ionization mass spectrometric data of three cardiac glycosides having an unusual sugar linkage, elaeodendrosides A, B and C, are reported. The decomposition patterns upon EI-MS were investigated by means of collision induced dissociation utilizing B/E linked scan experiments and deuterium labeling techniques. Besides the fragment ions related to aglycones, elaeodendroside A which is a 12-keto steroid, produces decomposition ions derived from cleavage of steroidal C- and D-rings. Elaeodendrosides B and C, which have a six-membered hemiacetal ring, generate ions derived from the cleavage of sugar rings and the aforementioned unusual sugar linkage.