Wiktionary
dioxaphetyl butyrate
n. An opioid analgesic derived from diphenylacetic acid.
Wikipedia
Dioxaphetyl butyrate
Dioxaphetyl butyrate ( INN; trade names Amidalgon, Spasmoxal) is an opioid analgesic which is a diphenylacetic acid derivative, related to other open-chain opioid drugs such as dextropropoxyphene, levacetylmethadol (LAAM), lefetamine and dimenoxadol.
It produces similar effects to other opioids, including dependence, euphoria, analgesia, sedation, constipation, dizziness and nausea.
In the United States it is a Schedule I Narcotic controlled substance with an ACSCN of 9621 and a 2013 annual aggregrate manufacturing quota of zero.