5-chloro-1-ethyl-3-methyl-1H-pyrazole-4-carbaldehyde
2-Ethyl-4-(imino-phenyl-methyl)-5-methyl-2H-pyrazol-3-ol
4-[(3-Chloro-phenyl)-imino-methyl]-2-ethyl-5-methyl-2H-pyrazol-3-ol
1-ethyl-3-methyl-4-nitroso-5-pyrazolone
(1-ethyl-5-hydroxy-3-methyl-1H-pyrazol-4-yl)-phenyl-methanone