Tiamulin is a semisynthetic pleuromutilin antibiotic.

Tessaric acid has antifeedant and allelochemical effects. Tessaric acid derivatives induce G/M cell cycle arrest in human solid tumor cell lines.

4-Azido-L-phenylalanine (p-Azido-L-phenylalanine) is an amino acid derivative that acts as a photoaffinity marker and can be used to detect localized protein environments.