1 H28 (3~{S},3'~{R},3'~{a}~{S},6'~{a}~{R})-6-chloranyl-3'-(3-chloranyl-2-fluoranyl-phenyl)-1'-(cyclopropylmethyl)spiro[1~{H}-indole-3,2'-3~{a},6~{a}-dihydro-3~{H}-pyrrolo[3,4-B]pyrrole]-2,4'-dione 1.000 2 6SJ 2-[(3~{S},3'~{a}~{S},6'~{S},6'~{a}~{S})-6-chloranyl-6'-(3-chlorophenyl)-4'-(cyclopropylmethyl)-2-oxidanylidene-spiro[1~{H}-indole-3,5'-3,3~{a},6,6~{a}-tetrahydro-2~{H}-pyrrolo[3,2-B]pyrrole]-1'-yl]ethanoic acid 0.730