MeSH note : cpd not in Chemline 7/14/83; RN in 9th CI Form Index for 5,12-dihydroquinoxalino(2,3-b)phenazine-2,9-disulfonic
acid (phacolysin in Negwer, 5th ed, #3514; MF C18H12N4O6S2): 1790-56-3; different
structure given for phacolysin in UD 24:43a (C21H17NO6S2) than in Negwer, 5th ed,
#3514;