4'-(1,4-Dihydro-2-mercapto-4,4,6-trimethyl-1-pyrimidinyl)acetophenone 4-24-00-00135 (Beilstein Handbook Reference) 63990-68-1 ACETOPHENONE, 4'-(1,4-DIHYDRO-2-MERCAPTO-4,4,6-TRIMETHYL)PYRIMIDINYL- BRN 0220921 USAF PD-66