1-(1-Sulfo-2-naphthyl)-2-thio-4,4,6-trimethyl dihydropyrimidine 1-Naphthalenesulfonic acid, 2-(2-mercapto-4,4,6-trimethyl-1(4H)-pyrimidinyl)- 2(1H)-Pyrimidinethione, 3,4-dihydro-1-(1-sulfo-2-naphthyl)-4,4,6-trimethyl- 6281-66-9 NSC5834 Usaf K-2601