1,4-methanobenz[a]azulene-5,10-dione, 1,4,4a,10a-tetrahydro-, (1R,4S,4aR,10aS)- InChI=1/C15H12O2/c16-11-4-2-1-3-10-14(11)12-8-5-6-9(7-8)13(12)15(10)17/h1-6,8-9,12-13H,7H2/t8-,9+,12-,13+/m1/s rel-(1R,4S,4aR,10aS)-1,4,4a,10a-tetrahydro-1,4-methanobenzo[a]azulene-5,10-dione