1,8-Dioxa-2,9,13-triazadispiro[4.1.4.3]tetradeca-2,9-dien-6-one, 3,10-bis(2,6-dichlorophenyl)-4,11-diphenyl-13-(phenylmethyl)-, (4R,5S,7S,11R)-rel-, compd. with trichloromethane (1:1)