preferred_name: testosterone acetate + A + H2O => progesterone + AH2 + O2
preferred_name_lc: testosterone acetate + a + h2o => progesterone + ah2 + o2
label: testosterone acetate + A + H2O => progesterone + AH2 + O2
label_lc: testosterone acetate + a + h2o => progesterone + ah2 + o2