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Table 3 Diagnostic ions of the methyl-branched alkenes in the red Ca. rufifemur variety.

From: Tropical parabiotic ants: Highly unusual cuticular substances and low interspecific discrimination

substance No. Substance diagnostic ions from hydration diagnostic ions from DMDS derivatization inferred double bond position
37 25-MeC37-ene 196, 365 243*, 271, 355, 383* 14*, 16 or 21, 23*
43 25-MeC38-ene, 26-MeC37-ene, 27-MeC38-ene 182, 196, 210, 364, 379, 393 229, 243, 257, 271, 369, 383, 397, 411 13, 14, 15, 16 or 22, 23, 24, 25
52 27-Methyl-C39-ene 196, 393 243, 271, 383, 411 14**, 16** or 23, 25
56 27-Methyl-C40-ene 210, 393 243*, 257, 271, 397, 411, 425* 14*, 15, 16 or 24, 25, 26*
61 27-MeC41-ene, 29-MeC41-ene 196, 224, 392, 421 243, 271*, 299, 383, 411*, 439 14, 16*, 18 or 23, 25*, 27
  1. *diagnostic ion/molecule with respective double bond position at least twice as abundant as remaining ions/molecules; ** position of double bond was confirmed at the positions 14 and 16 via cleavage after ozonisation