Molecular structure, characterization and stereochemical properties of new biologically interesting 3-(5-imidazo[2,1-b]thiazolylmethylene)-2-indolinones

New biologically interesting 3-(5-imidazo[2,1-b]thiazolylmethylene)-2-indolinones have been investigated by using X-ray crystallography, mass spectrometry, tandem mass spectrometry and theoretical calculations. The study has allowed to obtain information on the structural characterization of the stereoisomers and their conformational properties.