N,N-diethylethanamine;[[(2R,3S,4R,5R)-3,4-dihydroxy-5-[(4Z)-3-methyl-2-oxo-4-[[3-(trifluoromethyl)phenyl]methoxyimino]pyrimidin-1-yl]oxolan-2-yl]methoxy-hydroxyphosphoryl]methylphosphonic acid