Match the columns:
| Compound | Use | Source plant |
| P. Danthron | 1. Anti-parkinson | i. Cinchona ledgeriana |
| Q. L-Dopa | 2. Laxative | ii. Cassia sp. |
| R. Morphine | 3. Antimalarial | iii. Mucuna sp. |
| S. Quinine | 4. Analgesic | iv. Papaver somniferum |
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