A compound of formula (I)
wherein R is a group
R' is hydrogen, phenyl, C1-20 alkyl, C2-8 alkenyl or C2.8 alkynyl each of which may optionally be substituted; or C3-7 cycloalkyl,
X is a divalent group -Y-C=C-, and
Y is oxygen or sulphur, have antibacterial and/or antimycoplasmal activity.
式(I)化合物,其中 R 是一个基团,R'是氢、苯基、C1-20 烷基、C2-8 烯基或 C2.8 烷炔基,其中每个基团可任选被取代;或 C3-7 环烷基,X 是二价基团-Y-C=C-,Y 是氧或
硫,具有抗菌和/或抗原生质体活性。