1,2,4-Triazin-5(2H)-one, 1,6-dihydro-6,6-dimethyl-3- {[(phenylmethyl)thio]-} 3-(Benzylthio)-6,6-dimethyl-1,6-dihydro-1,2,4-triazin-5(2H)-one 59153-10-5 AIDS-128553 AIDS128553 NSC286711