label: (2Z,10Z)-3-hydroxy-5,17-dioxo-4,5-secoestra-2,10-diene-3-oate + NH4(+) => pyridinestrone carboxylate + 2 H2O + H(+)
label_lc: (2z,10z)-3-hydroxy-5,17-dioxo-4,5-secoestra-2,10-diene-3-oate + nh4(+) => pyridinestrone carboxylate + 2 h2o + h(+)