There is described compounds of formula (l):(see formula I)wherein: R1, R4 and R5 are independently selected from hydrogen, alkyl, aryl,aralkyl, -C(O)R9or -C(O)N(R6)R7; and R2 and R3 have prescribed meanings. The subjectpolycyclic aryl andpolycyclic heteroaryl substituted triazoles and pharmaceutical compositionscontaining thesecompounds can be used in inhibiting the activity of the receptor proteintyrosine kinase Axl. Useof these compounds in treating diseases or conditions associated with Axlcatalytic activity arealso disclosed.