SEARCH Articles Figures Tables 2, 5-Dimethyl pyrazine 2- [2 - ethyl pyrazine 5.6- Dimethyl-2-[2- -ethyl Myrmica Myrmica lobicomis 2.5- dimethyl-3-ethyl-pyrazines Myrmica ruginodis 2.5- dimethyl-3-ethyl-pyrazines Myrmica schencki 2.5- dimethyl-3-ethyl-pyrazines Pyrazine ethyl-3,6-dimethyl