3,5-Dineopentyl-4,5,7a,8,9,10,11,11a,12,13,14,15-dodecahydro-3H-dinaphtho[2,1-d:1',2'-f][1,3,2]diazaphosphepine 4-oxide

3,5-Dineopentyl-4,5,7a,8,9,10,11,11a,12,13,14,15-dodecahydro-3H-dinaphtho[2,1-d:1',2'-f][1,3,2]diazaphosphepine 4-oxide