Images of (<i>S</i>)- and (<i>R</i>)-allenes
<a href="https://en.wikipedia.org/wiki/User:Ffgamera" class="extiw" title="en:User:Ffgamera">Ffgamera</a>
<span class="int-own-work" lang="en">Own work</span> (<span lang="en" dir="ltr">Original text: <i><bdi lang="">Own drawing from ChemBioDraw 13.0. The eye is a clipart.</bdi></i></span>)