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Brevetoxin A

Skeletal chemical formula of brevetoxin A, a group of neurotoxins isolated from the marine dinoflagellate Karenia brevis (previously known as Gymnodinium breve and Ptychodiscus brevis.) Versions of brevetoxin A are distinguished by different moieties at the site designated R: (1) brevetoxin-1 (PbTx-1) R = -CH2C(=CH2)CHO; (2) brevetoxin-7 (PbTx-7) R = -CH2C(=CH2)CH2OH; and (3) brevetoxin-10 (PbTx-10) R = -CH2CH(-CH3)CH2OH. (Created by Minutemen on September 13, 2006. Public domain.)