CA19-9

Sialyl-Lewis^A
Names
	Systematic IUPAC name (12S,14S,15R,16R,32R,33R,34S,35S,36R,52R,53S,54R,55R,56Ξ,72S,73S,74R,75S,76S)-15,55-Diacetamido-14,33,35,56,73,74,75-heptahydroxy-36,52-bis(hydroxymethyl)-76-methyl-16-[(1R,2R)-1,2,3-trihydroxypropyl]-2,4,6-trioxa-1,7(2),3(4,2),5(4,3)-tetraoxanaheptaphane-12-carboxylic acid
	Other names sialyl LeA, SLeA, cancer antigen 19-9, CA19-9
Identifiers
CAS Number	92448-22-1 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:61793;
ChemSpider	9160877;
MeSH	sialyl+Lewis+A
PubChem CID	10985677;
UNII	ZEJ6FM4UJK ;
	SMILES O=C(O)[C@@]1(O[C@H]2[C@@H](O)[C@@H](CO)O[C@@H](O[C@H]3[C@H](O[C@H]4[C@@H](O)[C@H](O)[C@H](O)[C@H](C)O4)[C@@H](CO)OC(O)[C@@H]3NC(C)=O)[C@@H]2O)C[C@H](O)[C@@H](NC(C)=O)[C@H]([C@H](O)[C@H](O)CO)O1;
Properties
Chemical formula	C31H52N2O23
Molar mass	820.748 g·mol−1
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Carbohydrate antigen 19-9 (CA19-9), also known as sialyl-Lewis^A, is a tetrasaccharide which is usually attached to O-glycans on the surface of cells. It is known to play a role in cell-to-cell recognition processes. It is also a tumor marker used primarily in the management of pancreatic cancer.

Names

Systematic IUPAC name (1²S,1⁴S,1⁵R,1⁶R,3²R,3³R,3⁴S,3⁵S,3⁶R,5²R,5³S,5⁴R,5⁵R,5⁶Ξ,7²S,7³S,7⁴R,7⁵S,7⁶S)-1⁵,5⁵-Diacetamido-1⁴,3³,3⁵,5⁶,7³,7⁴,7⁵-heptahydroxy-3⁶,5²-bis(hydroxymethyl)-7⁶-methyl-1⁶-[(1R,2R)-1,2,3-trihydroxypropyl]-2,4,6-trioxa-1,7(2),3(4,2),5(4,3)-tetraoxanaheptaphane-1²-carboxylic acid
Other names sialyl Le^A, SLe^A, cancer antigen 19-9, CA19-9
Identifiers
CAS Number	92448-22-1^Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:61793
ChemSpider	9160877
MeSH	sialyl+Lewis+A
PubChem CID	10985677
UNII	ZEJ6FM4UJK^Y
SMILES O=C(O)[C@@]1(O[C@H]2[C@@H](O)[C@@H](CO)O[C@@H](O[C@H]3[C@H](O[C@H]4[C@@H](O)[C@H](O)[C@H](O)[C@H](C)O4)[C@@H](CO)OC(O)[C@@H]3NC(C)=O)[C@@H]2O)C[C@H](O)[C@@H](NC(C)=O)[C@H]([C@H](O)[C@H](O)CO)O1
Properties
Chemical formula	C₃₁H₅₂N₂O₂₃
Molar mass	820.748 g·mol⁻¹
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is ^YN ?) Infobox references