1,5(or 7)-Dimethyl-1,2,3,5,6,7-hexahydrodicyclopentapyrazine 1,5(or 7)-Dimethyl-2,3,6,7-tetrahydro-1H,5H-biscyclopentapyrazine 101198-21-4 DICYCLOPENTAPYRAZINE, 1,2,3,5,6,7-HEXAHYDRO-1,5(or 7)-DIMETHYL-