pentobarbitone
Concise Oxford English Dictionary © 2008 Oxford University Press:
pentobarbitone /ˌpɛntə(ʊ)ˈbɑːbɪtəʊn/ (US pentobarbital)
▶noun Medicine a narcotic and sedative barbiturate drug formerly used to relieve insomnia.
'pentobarbitone' also found in these Oxford entries:

