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There are clear hints that it may be useful to combine the phenidone with methyl, ethyl, propyl , or isopropyl alcohol.
Peak concentrations of propyl nitrate and butyl nitrate in south-central Kansas were 51 and 68 parts per trillion, respectively.
The family's common names follow the standard alkane hydrocarbon sequence: methyl paraben, ethyl paraben, propyl paraben, butyl paraben, etc.
The first four alkyl groups are methyl, ethyl, propyl , and butyl, with the number of carbon atoms being one, two, three, and four respectively.
The propyl group is a functional group derived from propane by the removal of a hydrogen atom.
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