
- A$A - CH _{3} CH _{2} CH = CH - CH _{3} \text {, }$
$B - CH _{3} CH _{2} CH _{2} CH = CH _{2} \text {, }$ $Saytzeff\,\,products$
- B$\text { A }- CH _{3} CH _{2} CH = CH - CH _{3} \text {, }$
$B - CH _{3} CH _{2} CH _{2} CH = CH _{2} \text {, }$ $Hafmann\,\,products$
- ✓$A - CH _{3} CH _{2} CH _{2} CH = CH _{2} \text {, }$
$B - CH _{3} CH _{2} CH = CHCH _{3} \text {, }$ $Hofmann\,\,products$
- D$A - CH _{3} CH _{2} CH _{2} CH = CH _{2} \text {, }$
$B - CH _{3} CH _{2} CH = CHCH _{3} \text {, }$ $Saytzeff\,\,products$

