circulātōrēs nominative/accusative/vocative plural of circulātor...
circulātōre ablative singular of circulātor...
circulātor circulātōrēs genitive circulātōris circulātōrum dative circulātōrī circulātōribus accusative circulātōrem circulātōrēs ablative circulātōre circulātōribus...