1,3-Dibutyldihydro-5-hydroxy-5-methoxy-2-thioxo-4,6(1H,5H)-pyrimidinedione 143413-72-3 4,6(1H,5H)-Pyrimidinedione, 1,3-dibutyldihydro-5-hydroxy-5-methoxy-2-thioxo- Merocil N,N'-Dibutyl-4,5-dihydro-5-hydroxy-5-methoxy-4-oxo-2-thiouracil