摘 要 ：From the roots of Rubia yunnanensis,which is an antitumor drug used in Yunnan,an antitumor glycocyclohexapeptide(RY-l)was obtained previously[1]．Further study resulted in the isolation of a new antitumor glycocyclohexapeptide, RY—2．Its structure was elucidated on the basis of spectral and chemical methods.
Abstract:From the roots of Rubia yunnanensis,which is an antitumor drug used in Yunnan,an antitumor glycocyclohexapeptide(RY-l)was obtained previously[1]．Further study resulted in the isolation of a new antitumor glycocyclohexapeptide, RY—2．Its structure was elucidated on the basis of spectral and chemical methods.