crystalline form of a triethylamine salt of the substituted thiazolyl acetic acid

A crystalline form of the triethylamine salt of (2Z) -2- (2-amino-5-chlorothiazol-4-yl) -2- (3-N-tertbutoxycarbonylaminopropoxyimino) acetic acid; wherein the crystalline form is characterized by at least one of the following properties: (a) an X-ray diffraction pattern comprising diffraction peaks at 2θ values of 5.00 ± 0.20, 12.92 ± 0.20, 15.00 ± 0.20, 16.92 ± 0.20, 22.36 ± 0.20, 23.36 ± 0.20 and 24.54 ± 0.20; (b) a melting start temperature of approximately 139 ° C; or (c) 293 K crystalline parameters comprising (i) a monoclinic crystalline system, (ii) a spatial group P21 / c, and (iii) unit dimensions of the cell substantially equal to: a> = 8,587 (4) A , b> = 35,594 (12) A, c> = 8,308 (3) A and β> = 100.63 (4) °.