pyridine-2-carbaldehyde-(2,S-dimethyl-iso thiosemicarbazone)

3-乙基-2,4,5-三甲基-1H-吡咯

3-ethyl-2,2,4-trimethyl-2H-pyrrole

dimethyl 2-cyano-2-methylbutanedioate

1-benzyl-2,4-dimethyl-1-oxo-2-phenyl-1λ⁵-phospholan-3-one