  We study pre-Nichols algebras of quantum linear spaces and of Cartan type
with finite GK-dimension. We prove that out of a short list of exceptions
involving only roots of order 2, 3, 4, 6, any such pre-Nichols algebra is a
quotient of the distinguished pre-Nichols algebra introduced by Angiono
generalizing the De Concini-Procesi quantum groups. There are two new examples,
one of which can be thought of as $G_2$ at a third root of one.
