Synthetics
3,5(6)-cocoa pyrazine has a chocolatey, roasted, and nutty aroma, reminiscent of cocoa powder.
Mosciano, Gerard P&F 17, No. 3, 57, (1992): Nut skin, brown, sweet, musty, with a slightly roasted peanut shell nuance
Luebke, William tgsc, (2009): Nutty nut skin hazelnut peanut chocolate roasted
Pell Wall Perfumes: Chocolate, cocoa, nutty-hazelnut and peanut, roasted
As with all pyrazines this is used in traces cocoa pyrazine at 0.1% in pg has a distinctively chocolate and cocoa powder odour with elements of roasted nuts. occurs in various nuts, asparagus, tea and tobacco as well as chocolate. even at 0.1% this is a very powerful material that can easily dominate your blend, so use with caution.
R C Treatt & Co Ltd: Roast nuts/almonds, cocoa/coffee, woody/potato crisps
Sigma-Aldrich: Almond; beef; caramel; cheese; corn; coffee; earthy; woody; tobacco.