6,6-dimethoxyhex-1-yne

methyl 1-(carbamoylamino)-4-[(4-chlorophenyl)carbamoyl]-2,5-dimethylpyrrole-3-carboxylate

methyl 1-(carbamoylamino)-2-methyl-5-phenyl-4-(phenylcarbamoyl)pyrrole-3-carboxylate

methyl 2-(methoxymethyl)benzoate

3-羟基-1,3-吡咯烷二羧酸-1-(1,1-二甲基乙基)-3-甲酯