A method of treating a disease or a disorder associated with abnormal cellular activities, wherein the disease is non-small cell lung cancer or prostate cancer, and wherein an ephrin, KDR, Flt-1, EGFR, or ErbB2 receptor tyrosine kinase is implicated, the method comprising administering, to a mammal in need thereof, a therapeutically effective amount of N-(3,4-dichloro-2-fluorophenyl)-7-({[(3aR,5r,6aS)-2-methyloctahydrocyclo-penta[c]pyrrol-5-yl]methyl}oxy)-6-(methyloxy)quinazolin-4-amine optionally as a pharmaceutically acceptable salt thereof, optionally together with a pharmaceutically acceptable carrier.