872721-38-5 Thymidine,3'-azido-3',5'-dideoxy-5'-(4,4-difluoro-1,3,5,5-tetrahydroxy-1,3,5-trioxido-2-oxa-1,3,5-triphosphapent-1-yl)-, compd. with N,N-diethylethanamine(1:3) 872721-40-9 Thymidine,3'-azido-3',5'-dideoxy-5'-(4,4-dichloro-1,3,5,5-tetrahydroxy-1,3,5-trioxido-2-oxa-1,3,5-triphosphapent-1-yl)-, compd. withN,N-diethylethanamine (1:3)