C
2
H
2
O
3
C
2
H
2
O
3
，摩尔质量 74.04 g/mol，可以指：
甲酸酐
CAS：
1558-67-4
乙醛酸
CAS：
298-12-4
同系物导航
C
2
H
4
O
3
CO
3
C
2
H
2
O
3
C
3
H
4
O
3
C
2
O
3
C
2
H
2
O
2
C
2
H
2
O
4
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