I was going to run some tests on the latest OpenBabel code, but before I got 
started I ran into a fairly serious problem:

echo "Oc1ccccc1" | babel -i smi -o can
c1(ccccc1)O

echo "Oc1ccccc1O" | babel -i smi -o can
c1(c(cccc1)O)O

Something has gone badly wrong with the canonicalizer -- these are awful 
SMILES.  The earlier version had rules that made for "nice looking" SMILES.  
These are a mess.  I realize that the whole canonicalizer was rewritten for 
good reason, but we've now lost critical functionality.

Craig

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