111072-31-2 (MONOSODIUM SALT) AIDS-155365 AIDS155365 Benzenesulfonate, 4-methoxy-5-[(2Z)-2-[1-[(2-methoxy-4-nitro-5-sulfonatophenyl)azo]-2-oxo-2-(phenylamino)ethylidene]hydrazino]-2-nitro- XTT Formazan