(11aR)-3,7-Bis [3,5-双(叔丁基)-4-甲氧基苯基] -10,11,12,13-四氢-10,10,13,13-四甲基-5-羟基[ 7,1-de:1',7'-fg] [1,3,2]二氧杂磷霉素, (11aR)-3,7-Bis[3,5-bis(tert-butyl)-4-methoxyphenyl]-10,11,12,13-tetrahydro-10,10,13,13-tetramethyl-5-hydroxy[7,1-de:1',7'-fg][1,3,2]dioxaphosphocin