Final answer:
Psilocybin, found in magic mushrooms, is a relatively mild psychedelic that is chemically similar to LSD and considered less potent.
Step-by-step explanation:
A relatively mild psychedelic substance that is chemically similar to LSD is psilocybin. Psilocybin is the active ingredient found in psyilocybin mushrooms, commonly referred to as magic mushrooms or shrooms. Chemically, psilocybin is 4-phosphoryloxyN, N-dimethyltryptamine, and it has effects similar to LSD but is usually considered less potent. Much like LSD, psilocybin is known to cause hallucinations and alter perceptions, thoughts, and emotions, although typically with a shorter duration of effect. Unlike LSD's synthetic origin, psilocybin is naturally substance extracted from certain types of mushrooms found in various parts of the world and has been used historically in religious and healing ceremonies.