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. 2020 Mar 11;25(6):1275. doi: 10.3390/molecules25061275

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Flame ionization detector (FID) response and electrophysiological responses of antennae (EAD) and maxillary palps (EPD) using Bactrocera frauenfeldi males and females to (A) rectal gland extracts from conspecific males and (B) rectal gland extracts from conspecific females. The numbered peaks indicate EAD- and EPD-active compounds: (E,E)-2,8-dimethyl-1,7-dioxaspiro[5.5]undecane (3), (E,E)-2-ethyl-8-methyl-1,7-dioxaspiro[5.5]undecane (4), ethyl caprate (5), and methyl laurate (6).