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1 John N. Low, Justo Cobo, Jaime Mera, Jairo Quiroga and Christopher Glidewell .
Molecular conformation and supramolecular aggregation in two fused pyrazoles: [pi]-stacked R[\bf 2\bf 2](6) dimers in 2,8,8-trimethyl-6,7,8,9-tetrahydropyrazolo[2,3-a]quinazolin-6-one, and sheets of a
lternating R[_2^2](12) and R[_6^6](48) rings in 3-tert-butyl-4',4'-dimethyl-1-phenyl-4,5,6,7-tetrahydro-1H-pyrazolo[3,4-b]pyridine-5-spiro-1'-cyclohexane-2',6'-dione , Acta Cryst (2004). C60, o265-o269 Â Â