1-(6-Sulfo-1-naphthyl)-2-thio-4,4,6-trimethyl dihydropyrimidine 2(1H)-Pyrimidinethione, 3,4-dihydro-1-(6-sulfo-1-naphthyl)-4,4,6-trimethyl- 2-Naphthalenesulfonic acid, 5-(2-mercapto-4,4,6-trimethyl-1(4H)-pyrimidinyl)- (9CI) 6281-67-0 NSC 5836 USAF K-1565