Bioassay guided fractionation of the methanol extract of Magnolia grandiflora L. (Magnoliaceae) leaves led to the isolation and characterisation of four aporphine alkaloids, magnoflorine, lanuginosine, liriodenine and anonaine. The cytotoxicities of the pure compounds magnoflorine and lanuginosine
(-)-Anonaine (1), (-)-asimilobine (2), (-)-nuciferine (3), (-)-anolobine (4), (-)-romerine (5), (-)-N-acetylanonaine (6), liriodenine (7), (+)-syringaresinol (8), N-trans-feruloyltyramine (9), N-cis-feruloyltyramine (10), scopoletin (11), 4-acetonyl-3,5-dimethoxy-p-quinol (12), vanillin (13),