| Compound | Description |
|---|
| Water | A clear, odorless, tasteless liquid that is essential for most animal and plant life and is an excellent solvent for many substances. The chemical formula is hydrogen oxide (H2O). (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed) |
| Oxygen | An element with atomic symbol O, atomic number 8, and atomic weight [15.99903; 15.99977]. It is the most abundant element on earth and essential for respiration. |
| alpha-amyrin | beta-amyrin is also available; a 5 ring triterpene derived from taraxasterol that differs from beta-amyrin in having the 29-carbon at the 19 position |
| uvaol | from Vauquelinia corymbosa (Rosaceae) |
| ursolic acid | |