3-Benzyl-5-(4-pyridylarboxamido)tetrahydro-2H-1,3,5-thiadiazine-2-thione der. AIDS-081357 AIDS081357 N-[5-Benzyl-6-thioxo(1,3,5-thiadiazaperhydroin-3-yl)]-4-pyridylcarboxamide