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 -CR 4A R 4B - or -CR 5A R 5B -CR 6A R 6B -, R 4A , R 4B , R 5A , R 5B , R 6A and R 6B are each independently a hydrogen atom or the like, R 1 is substituted or unsubstituted heterocyclyl or the like, R 2A and R 2B are each independently a hydrogen atom or the like, or R 2A and R 2B are taken together to form substituted or unsubstituted methylidene or the like, and R 3 is a hydrogen atom or the like, R 11 is carboxy or the like, R 7A and R 7b are each independently a hydrogen atom or the like, its ester form or a pharmaceutically acceptable salt thereof, or a hydrate thereof.
