abstract |
FIELD: chemistry. n SUBSTANCE: invention relates to 4-[(purin-6-yl)aminopolymethylenecarbonyl]-derivatives of 3,4-dihydro-3-methyl-7,8-difluoro-2 H -[1,4]benzoxazine of General formula I. n EFFECT: new compounds have been obtained that can find application in medicine as agents with antitumor activity. n n n n 1 cl, 2 tbl, 4 ex |