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805.Text file parser -- How to extract all lines that contain chem, but not any of org and cn?

User: bruce lee -- 2011-06-23          << 804  806 >>
Hits: 2686
Type: Text file parser   
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How to extract all lines that contain chem, but not any of org and cn?
Input Sample:
Output Sample:
Hint: You need to Download and install "Replace Pioneer" on windows platform to finish following steps.
1. ctrl-o open the source text file 
2. ctrl-h open 'replace' dialog 
* set 'replace unit' to 'Line' 
* set 'search for pattern' to: 
* uncheck option of 'Print unmatched unit' 
* check option of 'Enhnaced Regular Exp'(and uncheck "regular expression" option) 
* set 'replace with pattern' to: 
3. click 'replace', done. 
4. for multiple files, click 'batch...' button, and drag multiple files to "Batch Runner" window, and click "Batch Replace", done. 
Note: if you need reomve lines contain "cn" but not "cnn", you should use "\bcn\b" instead of "cn", here "\b" means word boundary.

Screenshot 1:  Replace_Window

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