... chloromycetin type broad-spectrum antibiotic, its chemical constitution is similar to the chloromycetin's, its armor sulphone base ... nitryl, thus the toxicity reduces, its antibacterial function is 2.5-5 times stronger than the chloromycetin. Clinically ... has strong immunosuppression action, is one kind of fine immunosuppressant. Its immunosuppression action is much more better than chloromycetin ...