Flavan

Flavan
Names
	IUPAC name Flavan
	Systematic IUPAC name 2-Phenyl-3,4-dihydro-2H-1-benzopyran
Identifiers
CAS Number	494-12-2;
3D model (JSmol)	Interactive image;
Beilstein Reference	383899
ChEBI	CHEBI:38691;
ChEMBL	ChEMBL444299;
ChemSpider	84973;
ECHA InfoCard	100.007.079
EC Number	207-786-6;
PubChem CID	94156;
CompTox Dashboard (EPA)	DTXSID50870558 ;
	InChI InChI=1S/C15H14O/c1-2-6-12(7-3-1)15-11-10-13-8-4-5-9-14(13)16-15/h1-9,15H,10-11H2 Key: QOLIPNRNLBQTAU-UHFFFAOYSA-N;
	SMILES C1CC2=CC=CC=C2OC1C1=CC=CC=C1;
Properties
Chemical formula	C15H14O
Molar mass	210.27 g/mol
	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

The flavans are benzopyran derivatives that use the 2-phenyl-3,4-dihydro-2H-chromene skeleton. They may be found in plants. These compounds include the flavan-3-ols, flavan-4-ols and flavan-3,4-diols (leucoanthocyanidin).

A C-glycosidic flavan can be isolated from cocoa liquor.^[1]

Casuarina glauca is an actinorhizal plant producing root nitrogen-fixing nodules infested by Frankia. There is a regular pattern of cell layers containing flavans.^[2]

^ Proanthocyanidin glycosides and related polyphenols from cacao liquor and their antioxidant effects. Tsutomu Hatano, Haruka Miyatake, Midori Natsume, Naomi Osakabe, Toshio Takizawa, Hideyuki Ito and Takashi Yoshida, Phytochemistry, April 2002, Volume 59, Issue 7, Pages 749–758, doi:10.1016/S0031-9422(02)00051-1
^ Laplaze, L.; Gherbi, H.; Frutz, T.; Pawlowski, K.; Franche, C.; Macheix, J. J.; Auguy, F.; Bogusz, D.; Duhoux, E. (2002). "Flavan-Containing Cells Delimit Frankia Infected Compartments in Casuarina glauca Nodules". Nitrogen Fixation: From Molecules to Crop Productivity. Current Plant Science and Biotechnology in Agriculture. Vol. 38. p. 455. doi:10.1007/0-306-47615-0_254. ISBN 0-7923-6233-0.