Wikipedia:  

Guanosine

Guanine, 9-beta-D-ribofuranosyl-; beta-D-Ribofuranoside, guanine-9; Vernine (VAN); GUANOSINE; Guo; Guanozin; Vernine; Inosine, 2-amino- (VAN); 6H-Purin-6-one, 2-amino-1,9-dihydro-9-beta-D-ribofuranosyl-; Guanine riboside; GUANINE-9:BETA-D-RIBOFURANOSIDE
Molecular Formula
C10 H13 N5 O5
Natural Isotopic Abundance Mass
283.2407200000
Mono-Isotopic Molecular Masses
C12N14:   283.091668554
C13N14:   293.125216932
C12N15:   288.07684302
C13N15:   298.1103913978
Guanosine image
Guanosine
InCHi String:
InChI=1S/C10H13N5O5/c11-10-13-7-4(8(19)14-10)12-2-15(7)9-6(18)5(17)3(1-16)20-9/h2-3,5-6,9,16-18H,1H2,(H3,11,13,14,19)/t3-,5-,6-,9-/m1/s1

isomeric SMILES:
C1=NC2=C(N1[C@H]3[C@@H]([C@@H]([C@H](O3)CO)O)O)NC(=NC2=O)N
canonical SMILES:
C1=NC2=C(N1C3C(C(C(O3)CO)O)O)NC(=NC2=O)N


IUPAC: IUPAC systematic
2-amino-9-[(2R,3R,4R,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]-3H-purin-6-one

IUPAC traditional
2-amino-9-[(2R,3R,4R,5R)-3,4-dihydroxy-5-methylol-tetrahydrofuran-2-yl]-3H-purin-6-one

IUPAC cas: IUPAC openeye
2-amino-9-[(2R,3R,4R,5R)-3,4-dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl]-3H-purin-6-one



PubChem Substance (SID):   85164932   151492   3677
PubChem Compound (CID):   6802
KEGG: Compound ID   C00387
CAS Registry IDs:   118-00-3   484-80-0   85-30-3
PDB Chemical Component   GMP
Miscellaneous Databases and IDs:   CHEBI 16750   NSC 19994   EINECS 204-227-8

Reference data were obtained primarily from the PubChem database.

Three dimensional molecular rendering uses Jmol.