Acetyl fentanyl powder was first synthesized in the late 60s but has been increasingly available around 2010. In addition, acetyl Fentanyl has been associated with deaths. This drug is also available in street name white china.
People can remotely refer to Acetyl fentanyl as a chemical derivative of Acetanilide. In addition, these two compounds are by no way synonymous. Acetanilide has its different history as a severe analgesic that eventually led to the acetaminophen discovery. Acetanilide, N-1-Phenethyl-4-Piperidyl also known as Acetyl Fentanyl can indicate to the ordinary person that their possible terms exist for the same compound (due to the comma after Acetanilide).