The 25 in LSD-25 refers to prior efforts by Hoffman to combine lysergic acid with various other organic moieties. https://archive.vn/vaKCX https://archive.vn/va

The 25 in LSD-25 refers to prior efforts by Hoffman to combine lysergic acid with various other organic moieties. https://archive.vn/vaKCX https://archive.vn/vaKCX The first 24 are not hallucinogenic. As I said in my earlier post, there are analogs to LSD with psychedelic effects. However they are much less potent. 2,3-dihydro is roughly 1/7th the potency of LSD. https://citeseerx.ist.psu.edu/document?repid=rep1&type=pdf&doi=2a1c8e0d8ae022723549bdf59d15ce2655334211 https://citeseerx.ist.psu.edu/document?repid=rep1&type=pdf&d... And it is not recent. The paper linked above is from 1964.