3‐Diphenyl­phosphino‐1,2:5,6‐di‐O‐isopropyl­idene‐4‐O‐methyl‐1d‐chiro‐inositol

The novel title compound, C₂₅H₃₁O₆P, contains rigid fused rings which are shown to be similar to the precursor structures. Weak C—H⋯O inter­molecular inter­actions produce two‐dimensional sheets composed of R₄⁴(28) rings.