| 1 | Draw perspective formulas for the isomers of isoleucine. | |
| 2 | Which isomer of carvone do you have? | |
| 3 | What is the association between the chirality and the odor of the carvone isomers ? | |
| 4 | Density functional method was applied to the study of the isomers of the primary explosive of tetrazene. | |
| 5 | A list of known impurities, with structure if available, including process impurities, degradants, and possible isomers. |