Whoa man, I'm trippin!
Elephants dancing with green-feather artichokes, what is that beating sound in the sky, distant lines of light streak like firecracker across the dark blue horizon.
LSD is an extract from ergot, a fungus, but it was very unstable. Hoffman added certain amino acids to it, to stabilize the compound, and created several different compound, though all had the same LSD effect. The 25th compound made in that line by Hoffman was called LSD-25. This is what most LSD is. LSD is actually one of the safest drugs around, that is if you don't physically do something drastic like jump off a building of slit your throat. It has very little long term side effects, if any, and does not do permanent damage to your bodily functions.
LSA is a different chemical. It is extracted from a different source, I think like some seed or plant. The effects are suppose to be like LSD, but I don't know, never tried LSA before.
I'm no organic chemist, but had to take 3 quarters os Ochem in college.
choner