Six compounds were isolated from Rhizoma Heterosmilacis Japonicae. They were identified as beta-sitosterol (I) dau-costerol (II),3,3',5,5'-tetrahydroxy-4'-methoxystilbene (III), naringenin (IV), alpha-L-butylsorbopyranoside (V) and macrozamin (VI). The compounds III, IV, V and VI were isolated from this genus for the first time.
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