5,11,17,23-Tetrakis{[(2-hydroxyethyl)thio]methyl}pentacyclo[19.3.1.1~3,7~.1~9,13~.1~15,19~]octacosa-1(25),3(28),4,6,9(27),10,12,15(26),16,18,21,23-dodecaene-25,26,27,28-tetrol AIDS-016452 AIDS016452 NSC650794