00575001_00600000/586025 2-oxaspiro[4.5]dec-7-en-1-one, 4,9,10-trihydroxy-6-methyl-3-methylene-, (5S,6R,9S,10R)- 4,9,10-Trihydroxy-6-methyl-3-methylene-2-oxa-spiro[4.5]dec-7-en-1-one InChI=1/C11H14O5/c1-5-3-4-7(12)9(14)11(5)8(13)6(2)16-10(11)15/h3-5,7-9,12-14H,2H2,1H3/t5-,7+,8-,9+,11-/m1/s Massarigenin A rel-(4R,5R,6S,9R,10S)-4,9,10-trihydroxy-6-methyl-3-methylene-2-oxaspiro[4.5]dec-7-en-1-one