| Compounds | 75 min | 90 min | 120 min |
| Hexanal 20 µl | + | + | + |
| Hexanal 35 µl | + | + | − |
| Heptanal 20 µl | + | + | + |
| Heptanal 35 µl | + | + | PG |
| Control | + | + | + |