The EI‐MS fragmentation mechanisms of the bacterial diterpenes polytrichastrene A and wanju‐2,5‐diene

Abstract The fragmentation mechanisms leading to the formation of several pronounced fragment ions formed during EI mass spectrometry diterpene hydrocarbons polytrichastrene A and wanju‐2,5‐diene were investigated by isotopic labelling experiments. All twenty singly 13 C‐labelled isotopomers these diterpenes enzymatically synthesised from ( C)geranylgeranyl diphosphate using synthase Chryseobacterium polytrichastri . Their spectrometric investigation allowed for conclusions on observed ions.