Yeah those seem to be some of the constituents or group of constituents. I had a quick look and it seems these are better extracted in high alcohol which may be hard to get a hold of. But at the end of the day it's not necessarily that those constituents cause the sleep effects as there is a greater dynamic and synergy between all of the constituents of the plant that will interact together producing the overall effect, so don't worry too much about NEEDING certain isolated constituents but play around with it. In my studies we always see the whole plant as having a certain action, but modern studies and orthodox medicine are always looking for compounds in isolation which may in fact take away from the overall effect for the sake of control (or the other way around). Every plant will be different in terms of constituent levels and so every extraction too... Yeah a double extraction by decocting as well will certainly give you more of what it has.

So yeah, glad to know you are being cautious, and looking forward to hearing more of your experiences with it. In what way are the dreams strange? I love experimenting with it too but haven't tried Calea z yet.