NEW MATERIAL: Compounds of formula I {Q is formula II [A1 is N or CR7 (R7 is H, a halogen, alkyl, etc.); A2 is N or CR2 (R2 is H or a halogen); A3 is N or CH; R1 is H or R15 (R15 is an alkyl, carbon ring, etc.); R3 is H, a halo gen, etc.; R4 is OH; R6 is H, a halogen, etc.]; B is formula III; R10 is H, an alkyl, alkenyl, etc.; R11 is H, an alkoxy, etc.; R12 is CR8a (R8a is H, an alkyl, etc.), etc.; R13 is CHR33 or CR33 (R33 is H or COOH), etc.; R14 is none or W-C'''-R34 (W is O, S, etc.; R37 is none or an alkyl; C''' is a 5- or 6-membered ring), etc.; L is L'-X2t-R39-L' [L' is Q' or X2Q' (Q' is R15, etc.); X2 is O, S, etc.; t is 0 or 1; R39 is an alkyl, an alkenyl, etc.], etc.}.
EXAMPLE: A compound of formula IV.
USE: An antimicrobial agent for therapy or prophylaxis of human or other aminal infectious disease.
PROCESS: A lactam-containing part B or quinolone part Q is prepared respectively and both parts are bonded together.
RONARUDO YUUJIIN HOWAITO
