Six new biphenyl quinolizidine lactone alkaloids: 14α-hydroxydecodine (1), 14β-hydroxydecodine (2), 4″-O-demethylheimidine (3), 4″-O-demethyl-9β-hydroxyvertine (4), 4″-O-demethylvertine N-oxide (5), and 4″-O-demethyl-9β-hydroxyvertine N-oxide (6) were isolated from so-called “sinicuichi” (origin: Heimia salicifolia) together with 18 known alkaloids. Their structures were determined by spectroscopic analyses and chemical conversions. © 2019 Elsevier Ltd