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A new ent-kaurane type diterpenoid glycoside from Inula japonica Thunb

Jiang Jiang Qin1, Jia Xian Zhu, Wei Dong Zhang

  • 1School of Pharmacy, Shanghai Jiao Tong University, Shanghai, China.

Archives of Pharmacal Research
|November 10, 2009
PubMed

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IUPAC Nomenclature of Ketones01:09

IUPAC Nomenclature of Ketones

Like aldehydes, ketones are named using IUPAC rules; in this case, by replacing “e” in the name of the longest hydrocarbon chain with “one.” In acyclic ketones, the ketonic carbon is given the lowest locant value. For instance, as shown below, a simple five-carbon ketone is named pentan-2-one, instead of pentan-4-one. IUPAC rules also allow the placing of the locant value before the parent name to give an alternate name, 2-pentanone.