2,7-biphenylenediol, 3,4,4a,4b,5,6,8a,8b-octahydro-, diacetate 3,4,4a,4b,5,6,8a,8b-octahydrobiphenylene-2,7-diyl diacetate InChI=1/C16H20O4/c1-9(17)19-11-3-5-13-14-6-4-12(20-10(2)18)8-16(14)15(13)7-11/h7-8,13-16H,3-6H2,1-2H