3-methylene-2-prop-2-yn-1-ylhexahydro-4H-furo[2,3-b]pyran 4H-furo[2,3-b]pyran, hexahydro-3-methylene-2-(2-propynyl)- InChI=1/C11H14O2/c1-3-5-10-8(2)9-6-4-7-12-11(9)13-10/h1,9-11H,2,4-7H