"2013-07-18T16:09:39"^^ . "300386721" . . "A naturally occurring red colorant derived from any of several lichens. It was widely used in antiquity for textile dyeing. Orcein is the essential constituent of archil and is used as a biological stain."@en . "orcein"@en . . "2015-04-21T21:57:02"^^ . .