We used the APEX telescope to look for complex organic molecules that might have been formed by the action of the strong outflow G331.512+0.103 on its molecular surroundings. An analysis of the obtained spectra led us to identify several organic molecules by a plethora of rotational molecular transitions. Some of the detected molecules in G331.512-0.103 are CH3CN, CH3OH, CH3CHO, CH3OCH3, CH3COCH3 and the isomers HCOCH2OH and HCOOCH3). The existence of these molecules indicates a high chemical complexity in the hot core induced by the interaction of the shocks with the primeval cloud.