Dieckol, a rhizomycin found in some brown algae species, has antimicrobial, anticancer, antioxidant, antiaging, antidiabetic, and neuroprotective effects, ameliorates acute hearing loss, and inhibits cell proliferation through cell cycle arrest in human tracheal fibroblasts via Hs680.Tr.

Purpurin 18 is an interesting dihydroporphyrin for generating photosensitizers. It has antioxidant activity.

2-Adamantanol was used to synthesize antiallergic drug Mizolastine.