Adult female mice produce a scent carrying a message (a pheromone) which delays the onset of puberty in immature females.
The pheromone contains these compounds, two of which are isomers. Which two?
| 1. | (E)-3-hepten-6-one | 2. | (E)-2-hepten-6-one |
| 3. | heptan-2-one | 4. | 2,5-dimethylpyrazine |
| 5. | pentyl acetate | 6. | (Z)-3-pentenyl acetate |
Numbers 1 and 2 are isomers. Each has formula C7H12O.
