Chemical behavior of conjugated polyenoic acids toward sulfuric acid. acid-catalyzed cyclization and successive rearrangement ofTrans-β-ionylidene crotonic acid - Tsukida, K.; Ito, M.; Ikeda, F. (Springer, 1974)
http://dx.doi.org/10.1007/BF01938957
Keywords: W; WW-YZ