I noticed that the better leaves had a browner look to them, so I felt like heating some poor quality ones to see if chlorophyll could be destroyed by heat, and the salvinorin spared. I roasted at 110,160 and 200C taking samples each hour or less for the high temp ones. The results for all were that chlorophyll and salvinorin decompose at roughly the same rates and these temperatures. At 110C the decomposition was slow, at 200 C very fast. A more complete study may come up with something positive, but I was not happy and called it a failure.