Synthetics
Grapefruit menthane smells like a citrusy, slightly sweet grapefruit, often used as a food additive.
Mosciano, Gerard P&F 26, No. 2, 40, (2001): Sulfurous with grapefruit-like note. it has green vegetative and minty tropical nuances of passion fruit and papaya as well as peach and apricot
Luebke, William tgsc, (2009): Sulfurous minty fresh grapefruit peel tropical fir needle seedy mango soupy papaya
FCI SAS: Strong penetrating grapefruit-like