The chemical is found in the eye tear film
It's from this papaer:http://www3.interscience.wiley.com/journal/109751781/abstract
I've looked everywhere to see what glyceryl Isoprene acetal
is but yet no clue....
I know isoprene=2-methylbuta-1,3-diene, and acetal is a molecule with two single bonded oxygens attached to the same carbon atom, and glyceryl probably contains glycerol, but don't know how to put them together