Is the Isolated Pentagon Rule Merely a Suggestion for Endohedral Fullerenes? The Structure of a Second Egg-Shaped Endohedral FullereneGd<sub>3</sub>N@<i>C</i><sub><i>s</i></sub>(39663)-C<sub>82</sub>

Is the Isolated Pentagon Rule Merely a Suggestion for Endohedral Fullerenes? The Structure of a Second Egg-Shaped Endohedral FullereneGd<sub>3</sub>N@<i>C</i><sub><i>s</i></sub>(39663)-C<sub>82</sub>