化学式C14H20N2O2(摩尔质量:248.32 g/mol)可以指:

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C14H22N2O2
C13H18N2O2 C14H20N2O2 C15H22N2O2
C14H18N2O2

C14H20N2O C14H20N2O3
C14H19NO2 C14H21N3O2
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