Pentaerythritol tetranitrate, also known as PENT, pentyl, PENTA, TEN, corpent, or penthrite, is an explosive material. It is the nitrate ester of pentaerythritol, and is structurally very similar to nitroglycerin. From Wikipedia
Investigators linked Guy Edward Bartkus to the attack through DNA, uncovering a bomb lab and extremist anti-natalist ideology.
