WE CLAIM:

1) Asciminib oxalate salt.

2) A crystalline form DC1 of Asciminib oxalate, characterized by a PXRD

comprising the peaks at about 9.57, 11.2, 13.8, 18.4, 19.3, 20.1, 21.9, 22.7,

23.6, 24.3, 25.5, 27.5, 30.0, 31.3, 33.3 ± 0.2 2 θ.

3) A process for the preparation of a crystalline form DC1 of Asciminib oxalate, comprising:
a) providing a mixture of Asciminib free base and oxalic acid in presence of a solvent;
b) isolating the crystalline form DC1 of Asciminib oxalate.

4) The process as claimed in claim 3, wherein the solvent is selected from methanol, ethanol,
isopropyl alcohol, n-butanol, tertiary butanol, acetone, ethyl methyl ketone, diethyl ketone,
methyl isobutyl ketone, dichloromethane, chloroform, ethyl formate, methyl acetate, ethyl acetate,
propyl acetate, butyl acetate, methyl propanoate.

5) A crystalline form DC2 of Asciminib phosphate, characterized by a PXRD

comprising the peaks at about 6.4, 8.0, 10.0, 14.4, 14.8, 15.4, 17.9, 18.7, 19.3,

20.1, 21.2, 22.3, 22.7, 24.4, 27.3, 30.6, 31.8, 33.1 ± 0.2 2θ.

6) A crystalline form DC2 of Asciminib phosphate, comprising :

a) providing a solution of Asciminib phosphate in propylene glycol;

b) isolating the crystalline form DC2 of Asciminib phosphate.

7) Asciminib trifluoroacetate salt.

8) A crystalline form DC3 of Asciminib trifluoroacetate, characterized by a

PXRD comprising the peaks at about 7.1, 8.5, 9.6, 11.4, 12.0, 14.4, 15.8, 17.0,

17.5, 18.2, 19.2, 19.6, 20.3, 21.4, 22.0, 23.0, 24.1, 25.5, 26.5, 28.0, 29.0, 30.3,

31.0, 32.4, 35.3 ± 0.2 2θ.

9) A process for the preparation of crystalline form DC3 of Asciminib trifluoro acetate,
comprising:
a) providing a mixture of Asciminib with trifluoro acetic acid in present of a solvent;
b) isolating the crystalline form DC3 of Asciminib trifluoro acetate.

10) A pharmaceutical composition comprising crystalline form DC1 of Asciminib oxalate or
crystalline form DC2 of Asciminib phosphate or crystalline form DC3 of Asciminib trifluoro
acetate with at least one pharmaceutically acceptable excipient.