label: (((2R)-1-(6-AMINO-9H-PURIN-9-YL)PROPAN-2-YLOXY)METHYL)PHOSPHONIC ACID MONO((2R)-1-(6-AMINO-9H-PURIN-9-YL)PROPAN-2-YL) ESTER
label_lc: (((2r)-1-(6-amino-9h-purin-9-yl)propan-2-yloxy)methyl)phosphonic acid mono((2r)-1-(6-amino-9h-purin-9-yl)propan-2-yl) ester