Office REIT Office Properties Income Trust will be offering some baby bonds with a maturity in 2050.
The ticker will be OPINL and the baby bonds will trade on NASDAQ. The issue will not trade on the OTC grey market, but you might be able to secure notes before exchange trading by calling your broker.
I did a quick look at the offering and don’t find anything unusual–quarterly interest payments, optionally redeemable starting in 2025 and a maturity date in 2050.
The preliminary prospectus can be read here.