Orcein
IUPAC 名称
4,12-bis[(2,4-dihydroxy-6-methylphenyl)amino]-3,13-dimethyl-8-oxatricyclo[7.4.0.0²,⁷]trideca-1,3,6,9,12-pentaene-5,11-dione
描述
Once used as a food colouring but now banned throughout the EC
Cudbear is a dye extracted from orchil lichens that produces colours in the purple range. It can be used to dye wool and silk, without the use of mordant.; Cudbear was the first dye to be invented in modern times, and one of the few dyes to be credited to a named individual.; Orcinol is extracted from archil lichen, Rocella tinctoria. It is then converted to orcein by ammonia and air. Orcein is a reddish-brown dye, orchil is a purple-blue dye. Orcein is also used as a stain in microscopy to visualize elastic fibers,Hepatitis B surface antigens and copper associated proteins. It is a mixture of phenoxazone derivates - hydroxyorceins, aminoorceins, and aminoorceinimines.
异构
CC1=CC(O)=CC(O)=C1NC1=C(C)C2=C3C(OC2=CC1=O)=CC(=O)C(NC1=C(O)C=C(O)C=C1C)=C3C
InChI标识符
InChI=1S/C28H24N2O7/c1-11-5-15(31)7-17(33)25(11)29-27-13(3)23-21(9-19(27)35)37-22-10-20(36)28(14(4)24(22)23)30-26-12(2)6-16(32)8-18(26)34/h5-10,29-34H,1-4H3
键
VPEASJIRGSVXBF-UHFFFAOYSA-N