example there can be exemplified alkali metal salts such as sodium salts lithium salts potassium salts etc alkaline earth metal salts such as aluminum salts calcium salts magnesium salts etc and ammonium salts for example a hydrochloride of the compound of the present invention can be obtained by dissolving the compound of the present invention in a solution of hydrogen chloride in an alcohol ethyl acetate or diethyl ether although the compound of the present invention may have asymmetrical carbon all of respective optical isomers and mixtures thereof fall within the scope of the present invention the optical isomer can be for example produced by means of optical resolution from the above obtained racemate by utilizing basicity thereof according to a known method using an optically active acid e g tartaric acid dibenzoyltartaric acid mandelic acid 10 camphor sulfonic acid etc or by the use of a previously prepared optically active compound as a raw material besides such an optical isomer can also be produced by means of optical resolution using a chiral column or asymmetric synthesis in addition among the compounds of the present invention all compounds which may form a tautomer fall within the scope of the present invention as one example there is exemplified example 16 or the like as shown in the test examples as described later the compound of the present invention or its pharmaceutically acceptable salt has high ros tyrosine kinase inhibitory activity and can be used as a preventing agent or a treating agent for diseases in which an ros tyrosine kinase.