1 1CQ 4,4'-{3-[(4-hydroxyphenyl)amino]-1h-pyrazole-4,5-diyl}diphenol 1.000 2 69T 4-{5-[(4-hydroxyphenyl)amino]-1h-pyrazol-3-yl}phenol 0.741 3 583 4,4'-(1h-pyrazole-3,4-diyl)diphenol 0.704