S. Black, Helen P. Wheatcroft, R. Roberts
Dec 26, 2019
Citations
0
Influential Citations
4
Citations
Journal
Journal of pharmaceutical sciences
Abstract
Cediranib Maleate is an Active Pharmaceutical Ingredient (API) in Phase III of development within AstraZeneca's oncology portfolio. Analysis of the crystal structure of this API confirmed that the selected salt form was robust. The salt formation step had to be re-designed to avoid an unwanted metastable polymorph. A solvate with a twist appeared during later development and was avoided using insights gained from its crystal structure. Differences between predicted and experimental aspect ratios correlate with weaker crystal interactions. Acceptable variability in particle size was defined and accommodated. The "Matwall" is introduced as a tool for building control of API performance from the crystal structure upwards.