1 69U 4,4'-(5-{[(4-hydroxyphenyl)methyl]amino}-1h-pyrazole-3,4-diyl)diphenol 1.000 2 69R 4,4'-(5-{[(1h-imidazol-4-yl)methyl]amino}-1h-pyrazole-3,4-diyl)diphenol 0.742