There is no better collection of analysis info on San Pedro and related species than both the links you posted from Trout.
At the moment I still haven't done any thorough GC/LC-MS analysis on cacti, and not aware if others have done. Actually burnt did test some peyote already (
link) , though peaks are not quantified.
I did test with TLC some extraction from a mix of pedro, peruvianus and tercheski, and it only shown mescaline. Maybe there are other trace alkaloids that didn't appear due to being under limit of detection, which probably means if there is anything else in such small quantities they wouldn't affect the trip much anyways. Same was true when me trav and infundibulum tested a bridgesii extract which only showed mescaline. We didn't quantify alkaloids.
Cosmic Spore, if you want, what would be great would be to start a new thread on the collaborative research subforum called "San Pedro / Peyote and related species Workspace" or something similar. Then you could try to extract the most relevant information from trout's book (giving due credit) and post there. Then we could all start adding information there regarding historical use, geographical location, etc etc.. And once I/we do any further analysis, we could post there too.
How does that sound?