Methylxanthines

Xanthine

Names
IUPAC name 3,7-Dihydropurine-2,6-dione
Other names 1H-Purine-2,6-dione
Identifiers
CAS Number	69-89-6 Y
3D model (Jmol)	Interactive image
ChEBI	CHEBI:17712 N
ChEMBL	ChEMBL1424 Y
ChemSpider	1151 Y
DrugBank	DB02134 N
ECHA InfoCard	100.000.653
IUPHAR/BPS	4557
KEGG	C00385 N
PubChem	1188
UNII	1AVZ07U9S7 N
InChI InChI=1S/C5H4N4O2/c10-4-2-3(7-1-6-2)8-5(11)9-4/h1H,(H3,6,7,8,9,10,11) Y Key: LRFVTYWOQMYALW-UHFFFAOYSA-N N InChI=1S/C5H4N4O2/c10-4-2-3(7-1-6-2)8-5(11)9-4/h1H,(H3,6,7,8,9,10,11) InChI=1S/C5H4N4O2/c10-4-2-3(7-1-6-2)8-5(11)9-4/h1H,(H3,6,7,8,9,10,11) Key: LRFVTYWOQMYALW-UHFFFAOYSA-N
SMILES c1[nH]c2c(n1)nc(nc2O)O
Properties
Chemical formula	C5H4N4O2
Molar mass	152.11 g/mol
Appearance	White solid
Melting point	decomposes
Solubility in water	1 g/ 14.5 L @ 16 °C 1 g/1.4 L @ 100 °C
Hazards
NFPA 704	1 2 0
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N  (what is YN ?)
Infobox references

Xanthine (/ˈzænθiːn/ or /ˈzænθaɪn/; archaically xanthic acid) (3,7-dihydropurine-2,6-dione), is a purine base found in most human body tissues and fluids and in other organisms. A number of stimulants are derived from xanthine, including caffeine and theobromine.

Xanthine is a product on the pathway of purine degradation.

Xanthine is subsequently converted to uric acid by the action of the xanthine oxidase enzyme.

Studies reported in 2008, based on ¹²C/¹³C isotopic ratios of organic compounds found in the Murchison meteorite, suggested that xanthine and related chemicals, including the RNA component uracil, were formed extraterrestrially. In August 2011, a report, based on NASA studies with meteorites found on Earth, was published suggesting xanthine and related organic molecules, including the DNA and RNA components adenine and guanine, were found in outer space.