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Coumarin (/ ˈ k uː m ər ɪ n /) or 2H-chromen-2-one is an aromatic organic chemical compound with formula C 9 H 6 O 2.Its molecule can be described as a benzene molecule with two adjacent hydrogen atoms replaced by an unsaturated lactone ring −(CH)=(CH)−(C=O)−O−, forming a second six-membered heterocycle that shares two carbons with the benzene ring.
Psoralen (also called psoralene) is the parent compound in a family of naturally occurring organic compounds known as the linear furanocoumarins.It is structurally related to coumarin by the addition of a fused furan ring, and may be considered as a derivative of umbelliferone.
It is also involved in the metabolism of several pharmaceuticals, carcinogens, and a number of coumarin-type alkaloids. CYP2A6 is the only enzyme in the human body that appreciably catalyzes the 7-hydroxylation of coumarin , such that the formation of the product of this reaction, 7-hydroxycoumarin, is used as a probe for CYP2A6 activity.
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Coumarin dyes are extensively used as gain media in blue-green tunable organic dye lasers. [14] [15] [16] Among the various coumarin laser dyes are coumarins 480, 490, 504, 521, 504T, and 521T. [16] Coumarin tetramethyl laser dyes offer wide tunability and high laser gain, [17] [18] and they are also used as active medium in coherent OLED emitters.
There are multiple delivery time options for Costco's mail order pharmacy program. Free shipping could take anywhere from 6 to 14 days to receive a prescription. For 2 to 5 day delivery, cost is ...
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