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1-Ethyl-3-methyl-1H-pyrazole-4-carbaldehyde can be used as substrate for the synthesis of many important compounds. For example, it can be used as the substrate to synthesize pyrazole derivative via Baeyer-Villiger oxidation. The obtained pyrazole derivative can be used to synthesize a series of orexin receptor dual antagonists.

1-Ethyl-3-methyl-1H-pyrazole-4-carbaldehyde (C7H10N2O) is a commercially available aldehyde. It can cause skin irritation and serious eye irritation. It should be stored in cool place and should be kept container tightly closed in a dry and well-ventilated place.