The bark of Magnolia officinalis is a well-known Traditional Chinese Medicine. In the present study, two new alkaloids, named (S)-4-keto-magnoflorine (6) and (R)-3,4-dehydromagnocurarine (11), together with seven known alkaloids: (S)-magnoflorine (5), trans/cis N-feruloylputrescine (7/8),
(-)-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),