31468-33-4
Dihydro-3-methyl-2H-pyran-2,6(3H)-dione
→
82923-78-2
methyl 5-chloro-4-methyl-5-oxopentanoate
18069-17-5
2-甲基戊二酸
62115-18-8
5-methoxy-2-methyl-5-oxopentanoate
79-37-8
草酰氯
+