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Usage: obgrep [options] "PATTERN" <filename> If no filename is supplied, then obgrep will use stdin instead. Options: -v Invert the matching, print non-matching molecules -c Print the number of matched molecules -i <format> Specify the input and output format -f Full match, print matching-molecules when the number of heavy atoms is equal to the number of PATTERN atoms -n Only print the name of the molecules -t NUM Print a molecule only if the PATTERN occurs NUM times inside the molecule