ACE comparison calculator

Please draw two structures and compare them.
 
NOTE: This program does a substructure test by default. If you want an exact structure test, choose Edit → Add → Explicit H atoms in at least the query applet.
 
Draw the target (student's response): Draw the query (author's reference structure):



     
     

perfect (diagonal) match
set StereoSearch to true
set ExactStereoMatching to true
set DoubleBondStereoMatching to none
set stereo matching model to global
Exact charge, isotope, radical matching are all true
list all matches' atom index arrays
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