Trivalvone [l] is the first example of a bis-aporphine dimer alkaloid with only one l-oxoquinoid monomer. The structure of trivalvone [1] has been definitively elucidated by ¹H nmr at 400 MHz and ¹³C nmr at 100 MHz. In addition, 11 isoquinoline alkaloids have been isolated from Trivalvaria macrophylla: 1 known bisdehydroaporphine (N-methylurabaine), 1 new (norisocorytuberine [3]) and 6 known aporphines (isocorytuberine, norcorydine, laurolitsine, boldine, anonaine, and nornuciferine), and 3 known oxoaporphine alkaloids (liriodenine, lysicamine, and oxostephanine). We also report some diagnostic chemical shift data (¹H nmr) for 6 tetrasubstituted aporphine alkaloids in CDCl₃ and C₅D₅N.