2-Methyloxazole-4-carboxaldehyde2-Methyl-1,3-oxazole-4-carboxaldehyde4-Formyl-2-methyl-1,3-oxazole2-methyl-1,3-oxazole-4-carbaldehyde2-methyloxazole-4-carbaldehyde2-Methyl-1,3-oxazole-4-carboxaldehyde2-Methyloxazole-4-carbaldehyde2-Methyl-4-formyloxazole2-Methyloxazole-4-carboxaldehyde2-Methyl-4-oxazolecarboxaldehyde2-甲基噁唑-4-甲醛