Complex sentence: Its amine side chain is able to react with acids, such as hydrochloric acid forming bufotenin hydrochloride, the hydrochloric salt of bufotenin.
Split into simpler sentences: Its amine side chain is able to react with acids forming an acidic salt. For example, it can react with hydrochloric acid forming bufotenin hydrochloride, the hydrochloric salt of bufotenin.