An electrophotographic photoconductor is disclosed, which comprises an electroconductive support and a photoconductive layer formed thereon comprising a bisazo pigment having the formula (I) serving as a charge generating material: ##STR1## wherein Ar represents a residual group of a coupler represented by ArH selected from the group consisting of: an aromatic hydrocarbon compound having a hydroxyl group, a heterocyclic compound having a hydroxyl group, an aromatic hydrocarbon compound having an amino group, a heterocyclic compound having an amino group, an aromatic hydrocarbon compound having a hydroxyl group and an amino group, a heterocyclic compound having a hydroxyl group and an amino group, an aliphatic compound having an enolic ketone group, and an aromatic hydrocarbon compound having an enolic ketone group. Further, charge generating materials and novel bisazo pigments for use in the electrophotographic photoconductor are disclosed.
2-oxa-isocephem compounds, compositions containing same and processes for preparing same
申请人:OTSUKA PHARMACEUTICAL CO., LTD.
公开号:EP0282895A2
公开(公告)日:1988-09-21
A 2-oxa-isocephem compound of the formula (1):
wherein R1, R2, R3 and R4 are various substituents, pharmaceutically acceptable salts thereof, composition containing the same and processes for preparing the same are disclosed. The compound is useful as an antimicrobial agent.