Try searching for...
SCFBio, IIT Delhi
Formula: C10H12N10O4S | Mol. Weight: 368.34 g/mol
IUPAC: 7H-purin-3-ium-6-amine;sulfate
C1=NC2=C(N1)C(=NC=[NH+]2)N.C1=NC2=C(N1)C(=NC=[NH+]2)N.[O-]S(=O)(=O)[O-]