Structural formula (skeletal) of the chemical compound <a href="https://en.wikipedia.org/wiki/4-aminobenzoic_acid" class="extiw" title="w:4-aminobenzoic acid">4-aminobenzoic acid</a> (PABA)
<a href="//commons.wikimedia.org/wiki/User:Slashme" title="User:Slashme">User:Slashme</a>
2007-10-26
Drawn in BKchem, perl, inkscape, vim