Which from following plants is useful to extract analgesic compound from it ?

Wintergreen oil contains methyl salicylate, which is widely used as an analgesic compound in various pain-relieving ointments and balms.

Turmeric contains curcumin, which is primarily known for its anti-inflammatory and antiseptic properties.

Cinnamon contains cinnamaldehyde, used mainly as a flavoring agent and has antimicrobial properties.

Citrus fruits are rich in citric acid and vitamin C.

Therefore, wintergreen is the plant useful for extracting an analgesic compound.

Answer: Wintergreen