Wikipedia:  

FAD

Riboflavin 5'-(trihydrogen diphosphate), 5'-5'-ester with adenosine; Flavitan; Flavine adenosine diphosphate; Adenine-flavin dinucleotide; 1H-Purin-6-amine, flavin dinucleotide; Flamitajin B; Flavin adenine dinucleotide; ADENOSINE 5'-(TRIHYDROGEN PYROPHOSPHATE), 5'-5'-ESTER with RIBOFLAVINE; Flavin adenin dinucleotide [JAN]; Adenine-riboflavine dinucleotide; 1H-Purin-6-amine, flavine dinucleotide
Molecular Formula
C27 H33 N9 O15 P2
Natural Isotopic Abundance Mass
785.5497420000
Mono-Isotopic Molecular Masses
C12N14:   785.157134458
C13N14:   812.247715078
C12N15:   794.130448496
C13N15:   821.221029117
FAD image
FAD
InCHi String:
InChI=1S/C27H33N9O15P2/c1-10-3-12-13(4-11(10)2)35(24-18(32-12)25(42)34-27(43)33-24)5-14(37)19(39)15(38)6-48-52(44,45)51-53(46,47)49-7-16-20(40)21(41)26(50-16)36-9-31-17-22(28)29-8-30-23(17)36/h3-4,8-9,14-16,19-21,26,37-41H,5-7H2,1-2H3,(H,44,45)(H,46,47)(H2,28,29,30)(H,34,42,43)/t14-,15+,16-,19-,20-,21-,26-/m1/s1

isomeric SMILES:
CC1=CC2=C(C=C1C)N(C3=NC(=O)NC(=O)C3=N2)C[C@H]([C@H]([C@H](COP(=O)(O)OP(=O)(O)OC[C@@H]4[C@H]([C@H]([C@@H](O4)N5C=NC6=C5N=CN=C6N)O)O)O)O)O
canonical SMILES:
CC1=CC2=C(C=C1C)N(C3=NC(=O)NC(=O)C3=N2)CC(C(C(COP(=O)(O)OP(=O)(O)OCC4C(C(C(O4)N5C=NC6=C5N=CN=C6N)O)O)O)O)O


IUPAC
[(2R,3S,4R,5R)-5-(6-aminopurin-9-yl)-3,4-dihydroxyoxolan-2-yl]methyl [[(2S,3R,4R)-5-(7,8-dimethyl-2,4-dioxobenzo[g]pteridin-10-yl)-2,3,4-trihydroxypentoxy]-hydroxyphosphoryl] hydrogen phosphate

IUPAC traditional
[(2R,3S,4R,5R)-5-(6-aminopurin-9-yl)-3,4-dihydroxy-tetrahydrofuran-2-yl]methyl [[(2S,3R,4R)-5-(2,4-diketo-7,8-dimethyl-benzo[g]pteridin-10-yl)-2,3,4-trihydroxy-pentoxy]-hydroxy-phosphoryl] hydrogen phosphate

IUPAC cas
[(2R,3S,4R,5R)-5-(6-amino-9-purinyl)-3,4-dihydroxy-2-tetrahydrofuranyl]methyl [[(2S,3R,4R)-5-(7,8-dimethyl-2,4-dioxo-10-benzo[g]pteridinyl)-2,3,4-trihydroxypentoxy]-hydroxyphosphoryl] hydrogen phosphate

IUPAC openeye
[(2R,3S,4R,5R)-5-(6-aminopurin-9-yl)-3,4-dihydroxy-tetrahydrofuran-2-yl]methyl [[(2S,3R,4R)-5-(7,8-dimethyl-2,4-dioxo-benzo[g]pteridin-10-yl)-2,3,4-trihydroxy-pentoxy]-hydroxy-phosphoryl] hydrogen phosphate

IUPAC systematic
[(2R,3S,4R,5R)-5-(6-aminopurin-9-yl)-3,4-dihydroxy-oxolan-2-yl]methyl [[(2S,3R,4R)-5-(7,8-dimethyl-2,4-dioxo-benzo[g]pteridin-10-yl)-2,3,4-trihydroxy-pentoxy]-hydroxy-phosphoryl] hydrogen phosphate



PubChem Substance (SID):   85165037   152122   3318
PubChem Compound (CID):   8964
KEGG: Compound ID   C00016
CAS Registry IDs:   146-14-5   16426-55-4
PDB Chemical Component   FAD
Miscellaneous Databases and IDs:   CHEBI 16238   NSC 112207   Beilstein Handbook Reference 4-26-00-03632   EINECS 205-663-1

Reference data were obtained primarily from the PubChem database.

Three dimensional molecular rendering uses Jmol.