... V. l-Butyryl-4-cin- nnmylpiperazine Hydrochloride and Related Compounds. J. Med. Chem. 1968,11,801-804. Q 1992 American Chemical Society Page 2. Orally Actioe PAF Antagonists Journal of Medicinal Chemistry, 1992, Vol. 35, No. 22 4119 chart I \ / OMe OMe ...