6-(1-Hydroxy-ethyl)-6,8a-dihydro-4aH-pyrano[3,2-b]pyran-2-one 6-(1-hydroxyethyl)-6,8a-dihydropyrano[3,2-b]pyran-2(4aH)-one 6-[(1S)-1-hydroxyethyl]-2,4a,6,8a-tetrahydropyran[3,2-b]pyran-2-one Diplopyrone InChI=1/C10H12O4/c1-6(11)7-2-3-9-8(13-7)4-5-10(12)14-9/h2-9,11H,1H3/t6-,7?,8?,9?/m0/s pyrano[3,2-b]pyran-2(4aH)-one, 6,8a-dihydro-6-[(1S)-1-hydroxyethyl]-