... of y-Hydroxy-A“"'- butenolides Possessing a Conjugated Substituent at the [i-Position MASAYOSHI IT0,* TSUTOMU ... The mixture was refluxed under argon for 1.5 h, cooled to room temperature, poured into ice-water ... 2) H. Higashida, N. Miki, M. Ito, T. Iwata, and K. Tsukida, Int. ...