What are the many useful chemicals that you said are locked away in plants?

Question: What are the many useful chemicals that you said are locked away in plants?
- Keywords:
  chemical
Asked by anon-218622 to Richard on 13 Jun 2019.
- Richard Gammons answered on 13 Jun 2019:
  
  Mostly sugars, like glucose and xylose! These can then be fermented into bioethanol which is a fuel!

Question: What are the many useful chemicals that you said are locked away in plants?