Hi there RDKitters,

Long time no type (I like to think I got used to RDKit now - even if
that removeHs thread took me by surprise).

Anyway enough of the blabber.  I am using the feature definition file
in RDKit and was wondering why the order of the rules in the file
makes a difference.

So

AtomType NAcceptor C[N;H0]=C
AtomType NAcceptor [N&v3;H0;$(Nc)]

Gives different results than

AtomType NAcceptor [N&v3;H0;$(Nc)]
AtomType NAcceptor C[N;H0]=C

These are different rules affecting different chemotypes...  why does
the above find the CN=C acceptor feature and the below does not?


Thanks,
-
Jean-Paul Ebejer
Early Stage Researcher

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