English:
Chemical diagram showing an example of a chemical compound with an exocyclic double bond (left, methylenecyclohexane) and one with an endocyclic double bond (right, 1-methylcyclohexene)
This image of a simple
structural formula
is
ineligible for
copyright
and therefore in the
public domain
, because it consists entirely of information that is common property and contains no original authorship.