High Quality Content by WIKIPEDIA articles! A heptazine, or tri-s-triazine or cyamelurine, is a type of chemical compound that consist of a planar triangular core group, C6N7, or three fused triazine rings, with three substituents at the corners of the triangle.The general form is 1,3,4,6,7,9,9b-heptaazaphenalene. The parent compound C6N7H3, where the three substituents are hydrogens, is called 1,3,4,6,7,9-hexaazacyc1azine or tri-s-triazine proper. Heptazines were discovered in the 19th century but their study has long been hampered by their general insolubility.

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