Wikipedia:  

GDP

Guanosine pyrophosphate; GUANOSINE DIPHOSPHATE; GRPP; Guanosine 5'-diphosphate; GDP; Guanosine diphosphate; Guanosine 5'-(trihydrogen diphosphate)
Molecular Formula
C10 H15 N5 O11 P2
Natural Isotopic Abundance Mass
443.2005220000
Mono-Isotopic Molecular Masses
C12N14:   443.024329371
C13N14:   453.057877749
C12N15:   448.009503837
C13N15:   458.0430522146
GDP image
GDP
InCHi String:
InChI=1S/C10H15N5O11P2/c11-10-13-7-4(8(18)14-10)12-2-15(7)9-6(17)5(16)3(25-9)1-24-28(22,23)26-27(19,20)21/h2-3,5-6,9,16-17H,1H2,(H,22,23)(H2,19,20,21)(H3,11,13,14,18)/t3-,5-,6-,9-/m1/s1

canonical SMILES:
C1=NC2=C(N1C3C(C(C(O3)COP(=O)(O)OP(=O)(O)O)O)O)NC(=NC2=O)N


IUPAC: IUPAC systematic
[[(2S,3S,4R,5R)-5-(2-amino-6-oxo-3H-purin-9-yl)-3,4-dihydroxy-oxolan-2-yl]methoxy-hydroxy-phosphoryl]oxyphosphonic acid

IUPAC traditional: IUPAC openeye: IUPAC cas
[[(2S,3S,4R,5R)-5-(2-amino-6-oxo-3H-purin-9-yl)-3,4-dihydroxy-tetrahydrofuran-2-yl]methoxy-hydroxy-phosphoryl]oxyphosphonic acid



PubChem Substance (SID):   85165075   152135   3337
PubChem Compound (CID):   8977
KEGG: Compound ID   C00035
CAS Registry IDs:   2577-83-5   146-91-8
PDB Chemical Component   GDP
Miscellaneous Databases and IDs:   ChemIDplus 000146918

Reference data were obtained primarily from the PubChem database.

Three dimensional molecular rendering uses Jmol.