liberine

{{Chembox

| ImageFile = Liberine v2.svg

| ImageSize = 200px

| ImageAlt =

| PIN = 2-Methoxy-1,9-dimethyl-7,9-dihydro-1H-purine-6,8-dione

| OtherNames = O(2),1,9-Trimethylurate; Trimethyluric acid

|Section1={{Chembox Identifiers

| CASNo = 56119-16-5

| CASNo_Ref = {{Cascite|changed|ChemSpider}}

| PubChem = 46926249

| ChemSpiderID = 48060240

| SMILES =CN1C2=C(C(=O)N(C(=N2)OC)C)NC1=O

| InChI = 1/C8H10N4O3/c1-11-5-4(9-7(11)14)6(13)12(2)8(10-5)15-3/h1-3H3,(H,9,14)

| InChIKey = IDVFNSHOEYLXJD-UHFFFAOYAU

| StdInChI = 1S/C8H10N4O3/c1-11-5-4(9-7(11)14)6(13)12(2)8(10-5)15-3/h1-3H3,(H,9,14)

| StdInChIKey = IDVFNSHOEYLXJD-UHFFFAOYSA-N}}

|Section2={{Chembox Properties

| C = 8 | H = 10 | N = 4 | O = 3

| Appearance =

| Density =

| MeltingPt =

| BoilingPt =

| Solubility = }}

|Section3={{Chembox Hazards

| MainHazards =

| FlashPt =

| AutoignitionPt = }}

}}

Liberine, also referred to as O(2),1,9-trimethyluric acid, is a purine alkaloid. It is an isolate of coffee beans, tea, kola nuts, guarana, cocoa beans and yerba mate.{{cite journal|year=2000|title=Minor alkaloids in caffeine-containing beverages|journal=Deutsche Lebensmittel-Rundschau|volume=96|issue=11|pages=363–368|url=http://www.cabdirect.org/abstracts/20003008257.html;jsessionid=9F32FB941DCD1B7597BDCAE41579154E|access-date=2013-10-16|archive-url=https://web.archive.org/web/20141210224333/http://www.cabdirect.org/abstracts/20003008257.html;jsessionid=9F32FB941DCD1B7597BDCAE41579154E|archive-date=2014-12-10|url-status=dead}}