2H-Pyran-2-one,3-crotonoyl-4-hydroxy-6-methyl- (8CI); 2H-Pyran-2-one,4-hydroxy-6-methyl-3-(1-oxo-2-butenyl)- (9CI);3-Crotonyl-4-hydroxy-6-methyl-2H-pyran-2-one
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