I now that eugenol can legitimately be used as a pest repellent but is isoeugenol also used in this way?
Eugenol is easily isomerized to isoeugenol.
UTFSE (hint... any safrole isomerization will probably work on eugenol)
I think he is looking for excuses to keep not only Eugenol at home, but also isoeugenol.
I saw a listing for isoeugenol from my chemical dealer the other day when buying veratraldehyde it has a legit use as a fragrance I believe you should look harder on google.