Crotonicacid, 4-hydroxy-4-methoxy-, g-lactone (6CI,7CI); (?à)-5-Methoxy-2(5H)-furanone; 2-Methoxy-5-oxo-2,5-dihydrofuran;4-Methoxy-2-butenolide; 5-Methoxy-2(3)-dihydrofuranone;5-Methoxy-2(5H)-furanone
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