COc1cc(/[NH+]=N/c2ccccc2)ccc1[O-] mol34375 0_1 COc1cc(/N=N/c2ccccc2)ccc1O mol34375 0_2 COc1cc(/N=[NH+]/c2ccccc2)ccc1[O-] mol34375 0_3 COc1cc(/N=N/c2ccccc2)ccc1[O-] mol34375 -1_1