SMARTS Matcher match failure

The SMARTS matcher

wrongly identifies

(pattern) Pyridine 'c1ncccc1'
as being present in
(target) Pyrimidine 'c1ncccn1'

but when the
target is written as 'c1ncncc1'

the matcher works correctly and declares that the
pattern is absent.

• shyamal

lshyamal@jubilantbiosys.com