#alkyl_halide__alkylhalide__haloalkane  organic compound in which halogen atoms have been substituted for hydrogen atoms in an alkane
  supertype:  organic_compound__organiccompound  any compound of carbon and another element or a radical
  subtype:  haloform  compounds with the formula CHX3, where X is a halogen atom
     subtype:  chloroform__trichloromethane  a volatile liquid haloform (CHCl3); formerly used as an anesthetic; "chloroform was the first inhalation anesthetic"
     subtype:  bromoform__tribromomethane  colorless liquid haloform CHBr3
     subtype:  fluoroform__trifluoromethane  colorless gas haloform CHF3 (similar to chloroform)
     subtype:  iodoform__tri-iodomethane__triiodomethane  sweet smelling yellow solid haloform CHI3

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