149310-63-4 23747-48-0 5-METHYL-6,7-DIHYDRO-5H-CYCLOPENTAPYRAZINE 5H-5-Methyl-6,7-dihydrocyclopenta(b)pyrazine 5H-5-Methyl-6,7-dihydrocyclopentapyrazine 5H-Cyclopentapyrazine, 6,7-dihydro-5-methyl- 6,7-Dihydro-5-methyl-5H-cyclopentapyrazine EINECS 245-864-1 FEMA No. 3306