3-Oxa-6-azabicyclo(3.1.0)hexane, 6,6',6''-phosphinylidynetris- 5774-47-0 Phosphine oxide, tris(3-oxa-6-azabicyclo(3.1.0)hex-6-yl)- (8CI) Tris(3-oxa-6-azabicyclo(3.1.0)hex-6-yl)phosphine oxide