 | ||
Truxinic acids are any of several stereoisomeric cyclic dicarboxylic acids with the formula (C6H5)2C4H4(COOH)2, found in various plants. They are obtained by a photochemical cycloaddition from cinnamic acid, where the two trans alkenes react head-to-head.
Isomers
These compounds have four chiral carbon atoms, which looks like there should be 16 (24) stereoisomers. However, the symmetry of the molecule allows for only ten possibilities, of which six have been described in literature:
References
Truxinic acid Wikipedia(Text) CC BY-SA