The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
Patent: US4113647 A1, 1978 ;
1: 1-methyl-pyrrolidin-2-one With sodium hydroxide in water 10 h; Heating; 2: formaldehyd With formic acid in water 8 h; Heating; 3: With hydrogenchloride in water