Occurrence and Sources of Triterpenoid Methyl Ethers and Acetates in Sediments of the Cross-River System, Southeast Nigeria
Figure 3
Examples of GC-MS data for triterpenoid esters in sediment extracts: (a) m/z 218 mass fragmentogram for amyrinyl esters, (b) mass spectrum of β-amyrinyl acetate, (c) mass spectrum of β-amyrinyl hexanoate, (d) mass spectrum of lupeyl acetate, (e) mass spectrum of lupeyl hexanoate, and (f) mass spectrum of germanicyl acetate.
