Patent ID: 9546129
Date: 2017-01-17
CPC Classifications: A61K,A61P,C07B,C07C,C07D

Claim:
1. A polymorph of 6,9-bis(carboxymethyl)-3-(2-ethoxy-2-oxoethyl)-11-oxo-12-oxa-3,6,9-triazatetradecan-1-oic acid characterized by a powder x-ray diffraction pattern substantially the same as that shown in FIG. 6D and/or a powder x-ray diffraction pattern having peaks at about 8.1, 12.0, 13.8, 15.4, 16.0, 16.6, 18.3, 19.3, 21.4, 22.1, 24.0, 26.5, and 29.2±0.2 degrees 2 theta, wherein the polymorph has a melting point in a range from 133° C. to 141° C.