Metrovacesa, Spain's largest property company, is struggling to sell a stake in the HSBC tower in London's Canary Wharf. The Madrid-based company, which faces EUR 7.1 bn in debt, is seeking to attract new investors for the trophy building but according to an article in the Financial Times on Thursday, Goldman Sachs, which was hired to advise on the sale process, has not been able to find any buyers.