Guacetisal is extracted from the esterification reaction of acetylsalicylic acid with guaiacol which can be used for research on the treatment of chronic bronchitis.

Vindesine sulfate is a vinca alkaloid which is a synthetic derivative of vinblastine, binds to the microtubular proteins of the mitotic spindle, leading to crystallization of the microtubule and mitotic arrest or cell death.

Indole is an aromatic heterocyclic organic compound. It has a bicyclic structure consisting of a six-membered benzene ring fused to a five-membered nitrogen-containing pyrrole ring.