Aspirin is a household word. The Chemical name of the compound is acetylsalicylic acid, which is referred to simply as 'Aspirin'. Aspirin, registered in 1899, is the name of acetylsalicylic acid that was developed by the German pharmaceutical company Bayer in the late 1800s.
The fascinating background to that is for over 2000 years prior to Bayer's discovery, there was a realisation that something in the leaves of a willow tree could give therapeutic benefit for pain relief. In fact, a group of agents or salicylates in the primary compound were derived from the naturally occurring compounds within the leaves of the willow tree.