(+)Cyclobut-G (R)-9-[2,3-Bis(hydroxymethyl)-1-cyclobutyl]guanine (R)-BHCG 127759-89-1 AIDS-030961 AIDS030961 BMS-180194 C-Oxetanocin-G C-Oxt-G Cygalovir Lobucavir SQ 34,514 [1R-1.alpha.,2.beta.,3.alpha.]-2-Amino-9-[2,3-bis(hydroxymethyl)cyclobutyl]- 6H-purin-6-one