CPC C07D 471/04 (2013.01) [C07B 2200/13 (2013.01)] | 17 Claims |
1. A diphosphate salt of a compound of formula I
![]() wherein the diphosphate salt is in crystalline Form A and is characterised by a powder XRD pattern comprising two or more peaks selected from 6.7±0.2 degrees two-theta, 7.1±0.2 degrees two-theta, 11.3±0.2 degrees two-theta, 12.3±0.2 degrees two-theta and 12.5±0.2 degrees two-theta.
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