(1S,2S,6S)-tetrahydrospiro[3,7-dioxabicyclo[4.1.0]heptane-2,2'-pyran] InChI=1/C9H14O3/c1-2-5-10-9(4-1)8-7(12-8)3-6-11-9/h7-8H,1-6H2/t7-,8-,9-/m0/s spiro[3,7-dioxabicyclo[4.1.0]heptane-2,2'-[2H]pyran], tetrahydro-, (1S,2S,6S)-