Wikipedia:  

NAD

Nicotinamide dinucleotide; Codehydrase I; DPN; Nicotineamide adenine dinucleotide; beta-Nicotinamide adenine dinucleotide; Nicotinamide adenine dinucleotide; Nadide [USAN:BAN:INN:JAN]; Enzopride; CO-1; Oxidized diphosphopyridine nucleotide; NAD+
Molecular Formula
C21 H28 N7 O14 P2 +
Natural Isotopic Abundance Mass
664.433042
Mono-Isotopic Molecular Masses
C12N14:   664.1169466646
C13N14:   685.1873982584
C12N15:   671.096190917
C13N15:   692.1666425108
NAD image
NAD
InCHi String:
InChI=1S/C21H27N7O14P2/c22-17-12-19(25-7-24-17)28(8-26-12)21-16(32)14(30)11(41-21)6-39-44(36,37)42-43(34,35)38-5-10-13(29)15(31)20(40-10)27-3-1-2-9(4-27)18(23)33/h1-4,7-8,10-11,13-16,20-21,29-32H,5-6H2,(H5-,22,23,24,25,33,34,35,36,37)/p+1/t10-,11-,13-,14-,15-,16-,20-,21-/m1/s1

isomeric SMILES:
C1=CC(=C[N+](=C1)[C@H]2[C@@H]([C@@H]([C@H](O2)COP(=O)([O-])OP(=O)(O)OC[C@@H]3[C@H]([C@H]([C@@H](O3)N4C=NC5=C4N=CN=C5N)O)O)O)O)C(=O)N
canonical SMILES:
C1=CC(=C[N+](=C1)C2C(C(C(O2)COP(=O)([O-])OP(=O)(O)OCC3C(C(C(O3)N4C=NC5=C4N=CN=C5N)O)O)O)O)C(=O)N


IUPAC
[(2R,3R,4R,5R)-5-(6-aminopurin-9-yl)-3,4-dihydroxy-oxolan-2-yl]methoxy-[[(2R,3R,4R,5R)-5-(5-carbamoylpyridin-1-yl)-3,4-dihydroxy-oxolan-2-yl]methoxy-oxido-phosphoryl]oxy-phosphinic acid

IUPAC traditional: IUPAC cas: IUPAC openeye
[(2R,3R,4R,5R)-5-(6-aminopurin-9-yl)-3,4-dihydroxy-tetrahydrofuran-2-yl]methoxy-[[(2R,3R,4R,5R)-5-(5-carbamoyl-1-pyridyl)-3,4-dihydroxy-tetrahydrofuran-2-yl]methoxy-oxido-phosphoryl]oxy-phosphinic acid

IUPAC systematic
[[(2R,3R,4R,5R)-5-(5-aminocarbonylpyridin-1-yl)-3,4-dihydroxy-oxolan-2-yl]methoxy-oxido-phosphoryl]oxy-[[(2R,3R,4R,5R)-5-(6-aminopurin-9-yl)-3,4-dihydroxy-oxolan-2-yl]methoxy]phosphinic acid



PubChem Substance (SID):   85164901   148694   3305
PubChem Compound (CID):   5892
KEGG: Compound ID   C00003
CAS Registry IDs:   159929-29-0   30429-30-2   53-84-9
PDB Chemical Component   NAD   NAH   NAJ
Miscellaneous Databases and IDs:   CHEBI 15846   EINECS 200-184-4   NSC 20272   Beilstein Handbook Reference 5-26-16-00399

Reference data were obtained primarily from the PubChem database.

Three dimensional molecular rendering uses Jmol.