4160-61-6
4-氧代-四氢-硫代吡喃-3-羧酸甲酯
→
~66%
61306-81-8
methyl 4-oxothiopyran-3-carboxylate
~5%
+
62723-59-5
methyl 4-oxo-2,3-dihydrothiopyran-5-carboxylate