Coeloginin is a phenanthrenoid found in the high altitude Himalayan orchid Coelogyne cristata. This molecule has a phenanthro[4,5-bcd]pyrone structure.[1][2]
References
^Majumder, Priyalal; Bandyopadhyay, Debabrata; Joardar, Subhendu (1982). "Coelogin and coeloginin: Two novel 9,10-dihydrophenanthrene derivatives from the orchid Coelogyne cristata". Journal of the Chemical Society, Perkin Transactions 1: 1131. doi:10.1039/P19820001131.
^Majumder, P. L.; Sen, S.; Majumder, S. (2001). "Phenanthrene derivatives from the orchid Coelogyne cristata". Phytochemistry. 58 (4): 581–6. doi:10.1016/S0031-9422(01)00287-4. PMID11576602.