＜正＞From the roots of Rubia yunnanensis, which is an antitumor drug used in Yunnan, an antitumor glycocyclohexapeptide （RY-1） was obtained previously. 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.
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