hydrochloric acid in chloroform a soln. of Au-complex in CHCl3 was shaken with conc. HCl for 5 min; org. layer was sepd., washed with an aq. Na2CO3, water, dried over K2CO3, evapd. in vacuo, residue was dissolved in a min. CHCl3, filtered, dild. with hexane; identified by m. p.;