| abstract |
The present invention relates to a quinazoline compound represented by formula (I) and their pharmaceutically acceptable salts, wherein: R1 and R2 are, independently of each other, hydrogen or a C1-C4 alkyl group; R3 is hydrogen or halogen; R4, R5, R6, R7, R8 and R9, which may be the same or different, are hydrogen or C1-C4 alkyl group, cycloproproyl, or R5 and R6 may form a cyclopenthyl or cyclohexyl ring together; R10 is hydrogen, a C1-C4 alkyl, C1-C4 alkoxy, hydroxy C1-C4 alkoxy or methylthiomethyloxy group. |