Phytochemistry p. 1231 - 1236 (1997)
Update date:2022-08-11
Topics:
Sudo, Hirokazu
Ide, Toshinori
Otsuka, Hideaki
Hirata, Eiji
Takushi, Anki
Takeda, Yoshio
From the 1-butanol-soluble fraction of a methanol extract of leaves of Premna subscandens, collected on Ishigaki Island, Okinawa, ten 10-O-acylated derivatives of catalpol and asystasioside E were isolated. The structures of nine new compounds were elucidated by spectroscopic methods and by chemical conversion.
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Doi:10.1021/acs.joc.0c00280
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