This innocent molecule is called Phenacetin.
Phenacetin was introduced in 1887, and was used principally as an analgesic, and was one of the first synthetic fever reducers to go on the market. It is also known historically to be one of the first non-opioid analgesics without anti-inflammatory properties.
Phenacetin is not used anymore, but.. why?
Our innocent friend can kill you.
The U.S. Food and Drug Administration ordered the withdrawal of drugs containing Phenacetin in November 1983, owing to its carcinogenic and kidney-damaging properties. As a result some branded, previously Phenacetin-based preparations continued to be sold, but with the Phenacetin replaced by safer alternatives.