Tetrahydropalmatine (THP) is an alkaloid found in several different plant species, mainly in the Corydalis genus (Yan Hu Suo), but also in other plants such as Stephania rotunda.

Oxindole is an aromatic heterocyclic building block.?2-indolinone derivatives have become lead compounds in the research of kinase inhibitors.Oxindole structure has been used in receptor tyrosine kinases (RTKs) inhibitors such as SU4984 and intedanib, the RTK family represents an important therapeutic target for anti-cancer drug development.

3-Isopropenyl-alphaalpha-dimethylbenzyl isocyanate is a bioactive chemical.