Dynamical masses versus the masses derived in this work. Systems that are in a (post-)interaction state (see text) are indicated by red triangles. HD 135240 has an ambiguous luminosity class (III-V), the blue triangles indicate masses derived for LC III and V (20.3 and 26.7 M_⊙, respectively). The dynamical mass of HD 159176 relies on the analysis of ellipsoidal variation and is quite uncertain.