Drug info - What did the little Monkeys take?

[Wierd Logic]

Monkey and his primate friends went to a festival a couple of weeks ago and had a blast. Whilst there, they hung out a lot with the people camping next to them, who had a little bottle of what they said contained Mescaline. It was dispensed by a little dropper much like liquid LSD, and after watching them having lots of fun on it the Monkeys decided to do an exchange with their liquid LSD for the Mescaline. Monkey took one drop, whilst most of his other friends took two.
Now, Monkey didn't notice anything for a couple of hours but knew that he wouldn't have come up yet, and decided to take a small bomb of MDMA. Half an hour later he was feeling extremely beautiful and at peace with the world, and although wasn't visually or sensually hallucinating certainly felt something wonderful that wasn't MDMA. His friends who took two had an absolutely lovely time, and planned to get more the next day (Alas, they ran out).

However, since that festival those silly little monkeys have realised, through research, that an active dose of mescaline probably couldn't be contained in one drop (feel free to correct me here). With a bit of research, they found the TMAs, and they assume it was one of those - chemically similar to Mescaline, but not synthesized and not extracted.

Long story short: Monkeys took something they thought was Mescaline, but turned out it probably wasn't, but was fun nonetheless.
It was euphoric, not very visual, very loving, an overall sense of peace. I know this isn't much to go on, but can anyone hazard a guess as to what it was? Monkey knows it was a silly idea to take drugs from an unknown source, but they were very friendly and Monkey reasoned that the opportunity probably wouldn't come up again.

Which TMA is most common in the U.K.? TMA-2?

Thanks lads...