The present invention relates to a compound of the formula [I]:
wherein R
1
is lower alkyl or hydroxy(lower)alkyl, and
R
2
is hydrogen or amino protecting group, or
R
1
and R
2
are bonded together and form lower alkylene;
R is -A-R
6
wherein A is bond, —NHCO—(CH
2
CO)
n
—, lower alkylene, —NH—CO—CO— or the like, and
R
6
is
wherein R
7
, R
8
, R
9
and R
10
are independently amino, guanidino, amidino or the like;
R
4
is carboxy or protected carboxy; and
R
5
is amino or protected amino, or a pharmaceutically acceptable salt thereof, a process for preparing a compound of the formula [I], and a pharmaceutical composition comprising a compound of the formula [I] in admixture with a pharmaceutically acceptable carrier.
本发明涉及一种式[I]的化合物:其中R1是较低的烷基或羟基(较低)烷基,而R2是氢或
氨基保护基,或者R1和R2结合在一起形成较低的烷基;R是-A-R6,其中A是键,—NHCO—(CH2CO)n—,较低的烷基,—NH—CO—CO—或类似物,而R6是其中R7,R8,R9和R10独立地是
氨基,
鸟氨酸基,酰胺基或类似物;R4是羧基或保护羧基;而R5是
氨基或保护
氨基,或其药学上可接受的盐,以及制备式[I]的化合物的方法,以及包含式[I]的化合物与药学上可接受的载体混合的药物组合物。