2689-68-1
4-氧四氢噻酚-3-羧酸甲酯
+
107-21-1
乙二醇
→
121023-57-2
methyl 1,4-dioxa-7-thiaspiro[4.4]nonane-9-carboxylate
141446-87-9
4,6-dihydro-1H-thieno[3,4-b]pyrrole 5,5-dioxide