InChI=1/C16H11ClO2/c17-12-7-5-10(6-8-12)15-16(19-15)9-11-3-1-2-4-13(11)14(16)18/h1-8,15H,9H2/t15-,16+/m1/s rel-(2R,3'R)-3'-(4-chlorophenyl)spiro[indene-2,2'-oxiran]-1(3H)-one spiro[2H-indene-2,2'-oxiran]-1(3H)-one, 3'-(4-chlorophenyl)-, (2R,3'R)-