PHARMACEUTICAL COMPOSITIONS WITH REDUCED TERT-BUTANOL LEVELS

1 . A process of producing a lyophilized drug product comprising the steps of:

1). dissolving a drug compound in a co-solvent system comprising tert-butanol (TBA) and at least one other solvent to obtain a drug solution;

2). adding at least one polyol to the drug solution to obtain a mixture; and

3). conducting lyophilization to obtain the lyophilized drug product.

2 . The process of claim 1 , wherein the other solvent is selected from the group consisting of water, ethanol, n-propanol, n-butanol, isopropanol, methanol, acetone, ethyl acetate, dimethyl carbonate, acetonitrile, dichloromethane, methyl ethyl ketone, methyl isobutyl ketone, 1-pentanol, methyl acetate, carbon tetrachloride, dimethyl sulfoxide, hexafluoroacetone, chlorobutanol, dimethyl sulfone, acetic acid, and cyclohexane.

3 . The process of claim 1 , wherein the polyol in step 2) is a diol or a triol.

4 . The process of claim 1 , wherein the polyol in step 2) is selected from propylene glycol, glycerol and polyethylene glycol (PEG).

5 . The process of claim 4 , wherein the polyol in step 2) is PEG.

6 . The process of claim 5 , wherein the polyol in step 2) is PEG400, PEG1000, PEG2000 or PEG4000.

7 . The process of claim 5 , wherein about 3%-6% PEG is added.

8 . The process of claim 1 , wherein the lyophilized drug product in step 3) comprises at least 20%, 25%, 50%, 75%, 90%, or 95% by weight of the drug compound.

9 . The process of claim 1 , wherein the lyophilized drug product in step 3) comprises less than about 5.0%, 4.5%, 4.0%, 3.5%, 3.0%, 2.5%, or 2.0%, 1.0%, 0.5%, or 0.1% by weight of TBA.

10 . The process of claim 1 , wherein the drug solution in step 1) comprises about 0.05 mol/L, 0.10 mol/L, 0.15 mol/L, 0.20 mol/L, 0.30 mol/L, 0.40 mol/L, 0.50 mol/L of the drug compound.

11 . The process of claim 1 , wherein the drug solution in step 1) has a pH of at least about 7, 8, 9, 10, 11, or 12.

12 . The process of claim 1 , wherein the drug compound forms a solvate with TBA.

13 . The process of claim 1 , wherein the drug compound is ((S)-4,11-diethyl-4-hydroxy-3,14-dioxo-3,4,12,14-tetrahydro-1H-pyrano[3′,4′:6,7]indolizino[1,2-b]quinolin-9-yl 4-(2-(5-(3-(2,4-dihydroxy-5-isopropylphenyl)-5-hydroxy-4H-1,2,4-triazol-4-yl)-1H-indol-1-yl)ethyl)piperidine-1-carboxylate), its tautomer, or its pharmaceutically acceptable salt.

14 . A pharmaceutical composition comprising the drug product produced from the process in claim 1 and at least one pharmaceutically acceptable excipient.

15 . The pharmaceutical composition of claim 14 , wherein the drug compound is ((S)-4,11-diethyl-4-hydroxy-3,14-dioxo-3,4,12,14-tetrahydro-1H-pyrano[3′,4′:6,7]indolizino[1,2-b]quinolin-9-yl 4-(2-(5-(3-(2,4-dihydroxy-5-isopropylphenyl)-5-hydroxy-4H-1,2,4-triazol-4-yl)-1H-indol-1-yl)ethyl)piperidine-1-carboxylate) or its tautomer.

16 . The pharmaceutical composition of claim 14 , wherein the pharmaceutical composition is in liquid form and comprises a solvent.

17 . The pharmaceutical composition of claim 16 , wherein the pharmaceutical composition comprises less than about 5.0%, 4.5%, 4.0%, 3.5%, 3.0%, 2.5%, 2.0%, 1.0%, 0.5%, or 0.0.1% by weight of TBA.

18 . The pharmaceutical composition of claim 16 , comprising at least about at least about 25 mg/mL, 50 mg/mL, 75 mg/mL, 100 mg/mL, 125 mg/mL, 150 mg/mL, 200 mg/mL, 225 mg/mL, or 250 mg/mL of the drug compound.

19 . A method of treating a patient comprising administering the pharmaceutical composition of claim 14 .

20 . The method of claim 19 , wherein the drug compound is ((S)-4,11-diethyl-4-hydroxy-3,14-dioxo-3,4,12,14-tetrahydro-1H-pyrano[3′,4′:6,7]indolizino[1,2-b]quinolin-9-yl 4-(2-(5-(3-(2,4-dihydroxy-5-isopropylphenyl)-5-hydroxy-4H-1,2,4-triazol-4-yl)-1H-indol-1-yl)ethyl)piperidine-1-carboxylate), its tautomer, or its pharmaceutically acceptable salt.

21 . The method of claim 19 , wherein the patient has cancer.