SOLID STATE FORMS OF 1H-INDOLE-6-CARBOXYLIC ACID, 2,3-DIHYDRO-3-[[[4- [METHYL[(4-METHYL-1-PIPERAZINYL)ACETYL]AMINO]PHENYL]AMINO]PHENYLMETHYLENE]-2-OXO-,METHYL ESTER, (3Z)-,ETHANESULFONATE(1:1) AND PROCESS FOR PREPARATION THEREOF
The present invention relates to solid state forms of 1H-Indole-6-carboxylic acid, 2,3-dihydro-3-[[[4-[methyl[(4-methyl-1- piperazinyl)acetyl]amino]phenyl]amino]phenyl methylene]-2-oxo-, methyl ester, (3Z)-, ethanesulfonate (1:1) represented by the following structural formula-1 and process for the preparation thereof.