Tricyclic or tetracyclic carbapenem compounds, their production and use

摘要

A polycyclic carbapenem compound of the formula (Ia'), (Ib') or (Ic') <IMAGE> (Ia') <IMAGE> (Ib') <IMAGE> (Ic') [wherein COOR2 is a carboxy group which may be esterified; Ra' is -(CH2)m-Ka-(CH2)n-Ua'; J is O or S; Rb' is -(CH2)m-Kb-(CH2)nUb'; J' is O, S or CH2; Rc' is -(CH2)m-Kc-(CH2)n-Uc', -(CH2)m-Kd-(CH2)n-Ud or a pair of groups, one of which is a hydroxy group, with the other being a hydroxzy group or an alkylsulfonylamino group, which may be substituted, in the position ortho to the first-mentioned hydroxy group] or a salt thereof are useful as an antibacterial agent.