132885-45-1 2,4(1H,3H)-Pyrimidinedione, 1-[(2-hydroxyethoxy)methyl]-5-methyl-3-(phenylmethyl)-6-(phenylthio)- 3-Benzyl-1-[(2-hydroxyethoxy)methyl]-6-phenylthiothymine 3-Bz-HEPT AIDS-002631 AIDS002631 HEPT derivative