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Published online by Cambridge University Press: 13 June 2017
1-(4-methoxyphenyl)-7-oxo-6-[4-(2-oxopiperidin-1-yl)phenyl]-4,5,6,7- tetrahydro-1H-pyrazolo[3,4-c]pyridine-3-carboxylic acid ethyl ester is an important intermediate in the synthesis of the anticoagulant, apixaban. X-ray powder diffraction data for this compound are reported [a = 14.101(4) Å, b = 10.105(6) Å, c = 9.532(7) Å, α = 72.774(1)°, β = 97.356(3)°, γ = 108.237(3)°, unit-cell volume V = 1231.45 Å3, Z = 2, and space group P-1]. No detectable impurities were observed.