I'm looking for some good organic chemistry drawing software for Mac OS X 10.4. I'm familiar with Isis/Draw but I believe you need the Mac OS 9 to run it. I'm also familiar with ChemDraw but I'm only looking for something for home use so am not willing to pay too much for it (<$200). Any suggestions? I've also seen xdrawchem on the internet. Has anyone had any experience with this program? Is it any good?