57884-84-1 L-Homocysteine, S-((4-(6-amino-9H-purin-9-yl)-2,3-dihydroxycyclopentyl)methyl)-, (1S-(1alpha,2beta,3beta,4alpha))- S-Aristeromycinyl-L-homocysteine S-Aristeromycinylhomocysteine