Name:    7-methyl-6,7-dihydro-5H-cyclopenta[b]pyrazine
CAS Number:    23747-48-0
 
Sort of a pyrazine, but closer to popcorn and corn than something like a dimethyl pyrazine species. 
Warm, and sort of caramelised already by itself, it's great in traces in biscuit, chocolate, coffee, and other gourmands. 
 
Supplied here at 10X greater concentration than has been previously offered elsewhere ;)