QSAR QUESTIONS



Title: QSAR QUESTIONS

Dear netters,
I am some how begginer in QSAR. I have got some basic questions.
1- is there a limit of N , the number of drugs used in qsar analysis, ?
2- how small is the correlation coeffient to be acceptable?
3- how much simillar the drugs should be?
4- Are there known drugs developed by qsar?
I appreciate any response
Regards
Tarek El-gogary
Chem. Dept.
Fac. of Sci.
Mans.Univ.
Egypt