COCC(=O)/C=C(\O)COC    mol36646    0_1
COCC(=O)/C=C(\[O-])COC    mol36646    -1_1
CO[CH-]/C(O)=C/C(=O)COC    mol36646    -1_2
CO[CH-]C(=O)/C=C(\O)COC    mol36646    -1_3