25mg. (11aS)-3,7-Bis[3,5-bis(tert-butyl)phenyl]-10,11,12,13-tetrahydro-5-hydroxy-5-oxide-diindeno[7,1-de:1',7'-fg][1,3,2]dioxaphosphocin, 98%, (99% ee). . Molecular Weight: 690.9. Molecular Formula: C45H55O4P. Color/form: off white to light yellow pwdr. Strem# 15-0578. http://www.strem.com/catalog/v/15-0578/