1-(.beta.-Naphthyl)-2-thio-4,4,6-trimethyl dihydropyrimidine 2(1H)-Pyrimidinethione, 3,4-dihydro-1-(.beta.-naphthyl)-4,4,6-trimethyl- 2(1H)-Pyrimidinethione, 3,4-dihydro-4,4,6-trimethyl-1-(2-naphthalenyl)- 63704-50-7 NSC49835 Usaf K-1357