JOINT FILER AGREEMENT

EXHIBIT 99.1

JOINT FILER AGREEMENT

In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree that a single Schedule 13D, or any amendment thereto, relating to the equity securities of CASI Pharmaceuticals, Inc., a Delaware corporation, shall be filed on behalf of each of the undersigned and that this Agreement shall be filed as Exhibit 99.1 to such Schedule 13D.

Dated: September 26, 2014		SPECTRUM PHARMACEUTICALS, INC.,
				a Delaware corporation
				By:		/s/ Xxxxxx X. Xxxxxxxxx, M.D.
				Name:		Xxxxxx X. Xxxxxxxxx, M.D.
				Title:		Chairman and CEO
Dated: September 26, 2014		SPECTRUM PHARMACEUTICALS CAYMAN, L.P.,
				an Exempted Limited Partnership organized under the laws of the Cayman Islands
				By:		Spectrum Pharmaceuticals International Holdings, LLC
				Its:		General Partner
						By:   Spectrum Pharmaceuticals, Inc.
						Its:   Managing Member
						By:		/s/ Xxxxxx X. Xxxxxxxxx, M.D.
						Name:		Xxxxxx X. Xxxxxxxxx, M.D.
						Title:		Chairman and CEO