Intraspecific and Intracolonial Variation in the Profile of Venom Alkaloids and Cuticular Hydrocarbons of the Fire Ant Solenopsis saevissima Smith (Hymenoptera: Formicidae)

Table 1

Venom alkaloids identified from hexane extracts of Solenopsis saevissima from different regions within Brazil.

Compounds	Short name	Diagnostic ions, 𝑚/𝑧; (relative abundance)	RT (min)	RI (calc.)
2-Me-6-undecenyl piperidine	C11:1	251 (M^+), 236, 180, 124, 111, 98	17.40	1819
cis-2-Me-6-undecyl piperidine	cis-C11	253 (M^+), 252, 238, 98	17.61	1841
trans-2-Me-6-undecyl piperidine	trans-C11	253 (M^+), 252, 238, 98	17.94	1884
cis-2-Me-6-tridecenyl piperidine	cis-C13:1	279 (M^+), 278, 124, 111, 98	19.11	2021
cis-2-Me-6-tridecyl piperidine	cis-C13	280 (M^+), 266, 98	19.30	2052
trans-2-Me-6-tridecenyl piperidine	trans-C13:1	279 (M^+), 264, 180, 124, 111, 98	19.41	2066
trans-2-Me-6-tridecyl piperidine	trans-C13	280 (M^+), 266, 98	19.60	2091

Notes: RT (min): retention times in minutes; RI (calc.): calculated retention indexes based on [21] using external standards as in Methods. Compounds are identified by comparing with mass spectra from [22, 23].