Humulone

Humulone
Names
	Preferred IUPAC name (6S)-3,5,6-Trihydroxy-2-(3-methylbutanoyl)-4,6-bis(3-methylbut-2-en-1-yl)cyclohexa-2,4-dien-1-one
	Other names α-Lupulic acid; α-Bitter acid
Identifiers
CAS Number	26472-41-3 ;
3D model (JSmol)	Interactive image;
ChemSpider	391214;
ECHA InfoCard	100.043.371
PubChem CID	442911;
UNII	KHB4767H3K;
CompTox Dashboard (EPA)	DTXSID501019081 DTXSID50946227, DTXSID501019081 ;
	InChI InChI=1S/C21H30O5/c1-12(2)7-8-15-18(23)17(16(22)11-14(5)6)20(25)21(26,19(15)24)10-9-13(3)4/h7,9,14,23-24,26H,8,10-11H2,1-6H3/t21-/m1/s1;
	SMILES O=C(\C1=C(/O)\C(=C(\O)[C@](O)(C1=O)C\C=C(/C)C)C\C=C(/C)C)CC(C)C;
Properties
Chemical formula	C21H30O5
Molar mass	362.466 g·mol−1
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Humulone (α-lupulic acid), a vinylogous type of organic acid, is a bitter-tasting chemical compound found in the resin of mature hops (Humulus lupulus).^[2] Humulone is a prevalent member of the class of compounds known as alpha acids, which collectively give hopped beer its characteristic bitter flavor.

^ Urban, Jan; Dahlberg, Clinton; Carroll, Brian; Kaminsky, Werner (2013). "Absolute Configuration of Beer's Bitter Compounds". Angew. Chem. Int. Ed. 52 (5): 1553–1555. doi:10.1002/anie.201208450. PMC 3563212. PMID 23239507.
^ De Keukeleire, J; Ooms, G; Heyerick, A; Roldan-Ruiz, I; Van Bockstaele, E; De Keukeleire, D (2003). "Formation and accumulation of alpha-acids, beta-acids, desmethylxanthohumol, and xanthohumol during flowering of hops (Humulus lupulus L.)". Journal of Agricultural and Food Chemistry. 51 (15): 4436–41. doi:10.1021/jf034263z. PMID 12848522.

[ReferenceA-1] Urban, Jan; Dahlberg, Clinton; Carroll, Brian; Kaminsky, Werner (2013). "Absolute Configuration of Beer's Bitter Compounds". Angew. Chem. Int. Ed. 52 (5): 1553–1555. doi:10.1002/anie.201208450. PMC 3563212. PMID 23239507.

[2] De Keukeleire, J; Ooms, G; Heyerick, A; Roldan-Ruiz, I; Van Bockstaele, E; De Keukeleire, D (2003). "Formation and accumulation of alpha-acids, beta-acids, desmethylxanthohumol, and xanthohumol during flowering of hops (Humulus lupulus L.)". Journal of Agricultural and Food Chemistry. 51 (15): 4436–41. doi:10.1021/jf034263z. PMID 12848522.

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