Ethanone, 1-[5-(2,3-dihydro-1H-inden-5-yl)-4-hydroxy-1-methyl-1H-pyrazol-3-yl]-, hydrazone

5-(2,3-Dihydro-1H-inden-5-yl)-3-(1-hydrazinylideneethyl)-1-methyl-1H-pyrazol-4-ol