3-[(2-Acetoxyethoxy)methyl]-1-benzyl-6-phenyl-thienol[2,3-c][1,2,6]thiadiazin-4-one 2,2-dioxide AIDS-104968 AIDS104968 Acetic acid 2-[2-(1-benzyl-2,2,4-trioxo-6-phenyl-1,4-dihydro-2H-2.lambda.6-thieno[2,3-c][1,2,6]thiadiazin-3-yl)-ethoxy]-ethyl ester