Potassium 7-hydroxy-1-naphthalenesulfona is naturally present in the fruit of the Rubiaceae gardenia, the flowers of the Iridaceae crocus, and the flowers and leaves of the Scrophulariaceae Scrophulariaceae.

4-Methylumbelliferyl heptanoate (4-Methylumbelliferyl enanthate) is a lipase fluorescent substrate that detects cell-mediated cytotoxicity and cell proliferation.

Larotaxel (XRP9881) is a taxane analogue with anticancer activity that promotes tubulin assembly and stabilizes microtubules, inducing apoptosis.