%0 Journal Article %T Molecular Formula Identification with SIRIUS %A Kai D¨¹hrkop %A Kerstin Scheubert %A Sebastian B£¿cker %J Metabolites %D 2013 %I MDPI AG %R 10.3390/metabo3020506 %X We present results of the SIRIUS 2 submission to the 2012 CASMI contest. Only results for Category 1 (molecular formula identification) were submitted. The SIRIUS method and the parameters used are briefly described, followed by detailed analysis of the results and a discussion of cases where SIRIUS 2 was unable to come up with the correct molecular formula. SIRIUS 2 returns consistently high quality results, with the exception of fragmentation pattern analysis of time-of-flight data. We then discuss possibilities for further improving SIRIUS 2 in the future. %K CASMI %K mass spectrometry %K small molecules %K SIRIUS %K molecular formula identification %K isotope patterns %K fragmentation patterns %U http://www.mdpi.com/2218-1989/3/2/506