PROMOTING AGENTS OF THE ACTIVITY OF SOME ANTITUMOR AGENTS AGAINST VARIOUS KINDS OF TUMOR CELLS INCLUDING MULTIPLE DRUG RESISTANT TUMOR CELLS ANDTHEIR SYNTHETIC METHODS

摘要

Title of the invention:Promoting agents of the activity of some antitumor agentsagainst various kinds of tumor cells including multiple drugresistant tumor cells and their synthetic methods.Abstract of the invention :This invention relates to new and useful 2,6-dimethyl-4-(pyrazolo[1,5-a]pyridin-3-yl)-1,4-dihydropyridine-3,5-di-carboxylate derivatives of the following formula;and pharmaceutically acceptable salts thereof, having the potentpromoting activity of some antitumor agents against various kindsof tumor cells including multiple drug resistant tumor cells.