title: 8,9-Isopropyl-idenedi-oxy-3-p-tolyl-1,6-dioxa-3-aza-spiro-[4.5]decane-2,10-dione.
abstract: In the title compound, C(17)H(19)NO(6), which may serve as a ketone catalyst for the asymmetric epoxidation of olefins, the crystal packing is consolidated by C-H⋯O inter-actions.
authors.forename: Chun-Sheng
authors.initials: CS
authors.lastname: Ling
authors.forename: Qiang
authors.initials: Q
authors.lastname: Wu
authors.forename: Shan-Shan
authors.initials: SS
authors.lastname: Li