It is intended to provide a compound that exhibits a strong antibacterial spectrum against various bacteria including gram-negative bacteria, or a pharmaceutical composition having an antibacterial activity against carbapenem-resistant bacteria.The present invention provides a compound represented by formula (I):wherein -W- is -S(=O)- or -S(=O)2-, -T- is -CR4AR4B- or -CR5AR5B-CR6AR6B-, R4A, R4B, R5A, R5B, R6A and R6B are each independently a hydrogen atom or the like, R1 is substituted or unsubstituted heterocyclyl or the like, R2A and R2B are each independently a hydrogen atom or the like, or R2A and R2B are taken together to form substituted or unsubstituted methylidene or the like, and R3 is a hydrogen atom or the like, R11 is carboxy or the like, R7A and R7b are each independently a hydrogen atom or the like, its ester form or a pharmaceutically acceptable salt thereof, or a hydrate thereof.
