I have to determine whether these certain chemicals are polar or not:

Question

Beta- sitosterol
Methyl cinnamate
Lapachol
Ethyl p-hydroxy cinnamate
Betulic acid
3,4,5- trihydroxy-7-methoxy flavone
Veratric acid
p-anixic acid

If there is a website that could make determining whether these compounds are polar or not Id appreciate it.

At one time www.chemfinder.com would allow me to log on, type in the name or formula, and it would display the structure/formula. It had multiple links to guide one to IR spectra, MSDS safety data sheets, m.p., b.p., and much more. Recently, however, that site has not allowed me to log on. It is a commercial site and I expect that just got tired of us freeloaders jamming up their network. You might try that first. Next, I suggest you go to www.google.com and type in the name of each of the chemicals and look at the structure. If you can get the structure I'm sure you will be able to make a determination yourself. Third, you might try looking up each in The Merck Index. I don't think there is a site for it (there may be but if there is I'm sure there is a subscription fee) but most libraries have a copy. I have a copy at home. It's a good addition for chemistry.
Some other tutor may have some other suggestions.