The former London head of a scandal-ridden state company for the promotion of Greek agricultural products will return to prison to complete a 6-year embezzlement sentence, following a Supreme Court decision made public yesterday. The court threw out an appeal by Zoi Ipsilandi, the former head of Agrex SA’s London bureau, against her conviction in 2000 for stealing $285,000 from company funds in the 1980s. Ipsilandi, who was arrested in London in 1986 but was cleared of other embezzlement charges by a British court, served 387 days in pretrial detention but was released pending her appeal. Agrex was at the center of the 1987 scandal involving the exportation, at Brussels-subsidized rates, of Yugoslavian corn that was passed off as Greek.