1-(.alpha.-Naphthyl)-2-thio-4,4,6-trimethyl dihydropyrimidine 2(1H)-Pyrimidinethione, 3,4-dihydro-1-(.alpha.-naphthyl)-4,4,6-trimethyl- 2(1H)-Pyrimidinethione, 3,4-dihydro-4,4,6-trimethyl-1-(1-naphthalenyl)- 63704-49-4 NSC49834 Usaf k-1356