Coelogin is a

phenanthrenoid Phenanthrenoids are chemical compounds formed with a phenanthrene backbone. These compounds occur naturally in plants, although they can also be synthesized. Phenanthrols Phenanthrols are any of five isomeric phenols derived from phenanthrene (1 ...

found in the high altitude Himalayan orchid '' Coelogyne cristata''. This molecule has a phenanthro ,5-''bcd''yran structure.

References

Phenanthrenoids Coelogyne {{phenol-stub