#aldehyde  any of a class of highly reactive chemical compounds; used in making resins and dyes and organic acids
  supertype:  #organic_compound__organiccompound  any compound of carbon and another element or a radical
  subtype:  #paraldehyde__ethanal_trimer__ethanaltrimer  a colorless liquid (a cyclic trimer of acetaldehyde) that is used as a sedative and a solvent
  subtype:  #acetaldehyde__ethanal  a colorless volatile water-soluble liquid aldehyde used chiefly in manufacture of acetic acid and perfumes and drugs
  subtype:  #formaldehyde__methanal  a colorless poisonous gas; made by the oxidation of methanol
  subtype:  #furfural__furfuraldehyde  a liquid aldehyde with a penetrating odor; made from plant hulls and corn cobs; used in making furan and as a solvent
  subtype:  #glyceraldehyde__glyceric_aldehyde  a sweet crystalline aldehyde formed by the breakdown of sugars
  subtype:  #propanal__propionaldehyde  a colorless liquid aldehyde
  subtype:  #propenal__acrolein  a pungent colorless unsaturated liquid aldehyde made from propene

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