water or alcohols. Twelve synthesized compounds were evaluated on their antineoplasticactivities on 60 human tumour cell lines panels in NCI USA. According to the screening results 3-phenyl-2H,5H-pyrano[3,2-c]chromen-2-one was discovered as a new leading skeleton suitable for further development. Some SAR conclusions were made. Antitubuline mechanism for the most active compound 3g has been proposed.