label: (3R)-3-hydroxy-16-methoxy-2,3-dihydrotabersonine + A = (3R)-1,2-didehydro-3-hydroxy-16-methoxy-2,3-dihydrotabersonine + AH2
label_lc: (3r)-3-hydroxy-16-methoxy-2,3-dihydrotabersonine + a = (3r)-1,2-didehydro-3-hydroxy-16-methoxy-2,3-dihydrotabersonine + ah2