1H-cyclopenta[c]phenanthren-1-one, 2,3-dihydro- 2,3-dihydro-1H-cyclopenta[c]phenanthren-1-one InChI=1/C17H12O/c18-15-10-9-13-8-7-12-6-5-11-3-1-2-4-14(11)16(12)17(13)15/h1-8H,9-10H