... lUI~ASEK, Jarmila STETINOVA, laroslav KovAc, Vladimir ZVAK, Jan LESKO, Miloslava DANDAROVA and Eva VLNIESKOVA Department of Organic Chemistry, Slovak Technical ... The chemical shifts of protons H-3 and H-4 of derivatives IlIa-lIle occured at [) 7'68-7'69 ... Collect. ...