苦杏碱

1,3,7-trimethyl-8-phenylpurine-2,6-dione

8-benzyl-1,3,7-trimethylpurine-2,6-dione

(E)-8-Benzyliden-3,7,8,9-tetrahydro-1,3,7-trimethyl-9-phenyl-1H-purin-2,6-dion

3,4,5,7-Tetrahydro-1,3,7-trimethyl-10-anti,11-syn-diphenyl-4,5-ethano-1H-purin-2,6-dion