4-(Benzenesulfinyl-cyano-methyl)-5,5-dimethyl-2-oxo-tetrahydro-furan-3-carboxylic acid methyl ester

methyl 4-(cyanomethyl)-5,5-dimethyl-2-oxotetrahydrofuran-3-carboxylate

乙基4,5,5-三甲基-2-氧代-2,5-二氢-3-呋喃羧酸酯

2-甲氧基吡啶

2-氯烟酰氯