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新 C21 类固醇 glycoside， 11-O-tigloyl-12- β -O 乙酰 tenacigenin B 3-O- β -d-glucopyranosyl-(1 → 4 )- β -d-glucopyranosyl-(1 → 4 )-3-O-methyl-6-deoxy- β -d-allopyranosyl-(1 → 4 ) β - d-oleandropyranoside (1 ) ，命名 tenacissoside N 从 Marsdenia tenacissima 的茎被孤立。gly