Indolyl carboxylic acids and derivatives
Medium-chain hydroxy acids and derivatives
N-acyl-alpha amino acids and derivatives
Fatty acyl glycosides of mono- and disaccharides
N-carbamoyl-alpha amino acids and derivatives
Trihydroxy bile acids, alcohols and derivatives
Naphthyridine carboxylic acids and derivatives
Imidazolyl carboxylic acids and derivatives
Short-chain hydroxy acids and derivatives