1 Pfizer Ltd (TYGACIL)
2 Jiangsu Hansoh Pharmaceutical Group Co. Ltd. (Zhetan)
3 Chia Tai Tianqing Pharmaceutical Group Co. Ltd. (Tianjie)
4 Zhejiang Hisun Pharmaceutical Co. Ltd. (Hisun Liliang)
5 Jiangsu Osaikang Pharmaceutical Co. Ltd. (Aotijia)