. "5-[1-{4-[(S)-1-(5-Benzyloxy-2,2,4,6,7-pentamethyl-2,3-dihydro-benzofuran-3-ylmethyl)-pyrrolidin-2-ylmethoxy]-phenyl}-meth-(Z)-ylidene]-thiazolidine-2,4-dione; compound with (Z)-but-2-enedioic acid" . "21a maleate" . . . . . . . . . . .