Peptide components of formula 1, pharmaceutically acceptable base salts thereof, pharmaceutical compositions and their use as antiinfective agents ##STR1## where R.sub.1 is alkyl, cycloalkyl or cycloalkylmethyl; R.sub.2 is hydrogen or alkyl and R.sub.3 is hydroxy or an amino acid residu of the formula ##STR2## where X is hydrogen, alkyl or hydroxymethyl and n is an integer of 0 to 4 and R.sub.4 and R.sub.5 are alkyl, hydrogen, benzyl or cyclohexylmethyl.
公式1的肽组成部分,其药学上可接受的盐基,制药组合物及其作为抗感染剂的用途
其中,R1是烷基,环烷基或环烷基甲基;R2是氢或烷基,R3是羟基或公式中的
氨基酸残基之一:
其中,X是氢,烷基或羟甲基,n是0到4的整数,R4和R5是烷基,氢,苄基或环己甲基。