Castavinol

Castavinols are natural phenolic compounds found in red wines.[1] These molecules are colorless and are derived from anthocyanin pigments. Thus their formation leads to a wine color loss.

Chemical structure of castavinol C3.

Known molecules
gollark: That's entirely unrelated. I just like the idea.
gollark: Well, remember how I said that none were safe?
gollark: Won't they just all collect on one side or something?
gollark: Pieces have a fixed radius of some value to allow collision to work.
gollark: Also, it's continuous spacewise.

References
  1. Castavinol, a new series of polyphenols from Bordeaux red wines. Chantal Castagnino and Joseph Vercauteren, Tetrahedron Letters, Volume 37, Issue 43, 21 October 1996, pp. 7739-7742, doi:10.1016/0040-4039(96)01761-3
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