12-hydroxy-16-oxatetracyclo(10.3.1.0[1,5]. 0[7,11])hexadec-7(11)ene-2,6-dione ?

C₁₅H₁₈O₄

Ranganathan, SubramaniaMuraleedharan, K. M.Rao, CH. ChandrashekharVairamani, M.Karle, Isabella L.

Organic Letters (2001) 3, 16 2447

a=11.471(1)Å   b=14.1580(10)Å   c=17.1210(10)Å

α=73.02°   β=89.26°   γ=89.44°