... These styrenes (2b,23) 2f,24) 2h24) and 2i24) and furan 2g25) were chemically synthesized by the ... The reaction time and the chemical yield are listed in Tables 1 and 2. 2a (Ar-CHx ... 11) Takemoto M., Achiwa K., Stoynov N., Chen D., Kutney JP, Phyto- chemistry, 42, 423—426 ...