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  • Amino Acids, Sulfur
    Amino Acids, Sulfur
    Year introduced: 1974
    MeSH
  • Esters
    Esters
    Compounds derived from organic or inorganic acids in which at least one hydroxyl group is replaced by an –O-alkyl or another organic group. They can be represented by the stru...<br/>Year introduced: 1991(1968)
    MeSH
  • Retinaldehyde
    Retinaldehyde
    A diterpene derived from the carotenoid VITAMIN A which functions as the active component of the visual cycle. It is the prosthetic group of RHODOPSIN (i.e., covalently bonded...<br/>Year introduced: 1991(1975)
    MeSH
  • Guanidines
    Guanidines
    A family of iminourea derivatives. The parent compound has been isolated from mushrooms, corn germ, rice hulls, mussels, earthworms, and turnip juice. Derivatives may have ant...<br/>
    MeSH
  • Isothiocyanates
    Isothiocyanates
    Organic compounds with the general formula R-NCS.<br/>Year introduced: 1994
    MeSH

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