(11bS)-1,10-Bis(4-chlorophenyl)-12-hydroxy-4,4,7,7-tetramethyl-4,5,6,7-tetrahydrodiindeno[7,1-de:1',7'-fg][1,3,2]dioxaphosphocine 12-oxide 1g

(11bS)-1,10-Bis(4-chlorophenyl)-12-hydroxy-4,4,7,7-tetramethyl-4,5,6,7-tetrahydrodiindeno[7,1-de:1',7'-fg][1,3,2]dioxaphosphocine 12-oxide 1g