Volatile (aroma/scent-defining) compounds from Himalayan Balsam (Impatiens glandulifera)?
There's seemingly a lot published on the invasion dynamics of Impatiens glandulifera, but little on the scent-giving volatile compounds.

All I could find is a poster from a 2010 symposium on Terpenes - Application, Activity and Analysis, organized by the Phytochemical Society of Europe (PSE).

The authors presented a method to sample volatile compounds from the flowers of the neophytic Impatiens glandulifera and the native Impatiens noli-tangere without cutting them off the plant and analyzed the mixture of compounds by GC-MS.

The scents seem to stem from complex mixtures of monoterpenes.

In the flowers of both plants the following terpenes could be detected:


$\alpha$-pinene
$\beta$-pinene  
camphene 
1,4-cineole
d-limonene
1,8-cineole
$\alpha$-terpinolene
1-terpineol
$\alpha$-terpineol
$\beta$-terpineol


Only in Impatiens noli-tangere were found


(Z)-ocimene
fenchol
geraniol


Only in Impatiens glandulifera was found


$\beta$-phellandrene