My poor old eyes see a lot of thorns/prickles along the visible stems in the one image. There also appear to possibly be prickles along the petioles AND petiolules.
Additionally,
Aesculus parviflora will have opposite arrangement of its palmately compound leaves. The plant in question has alternate arrangement along those thorny/prickly stems.
I will invite any question about Bottlebrush Buckeye, as they are an intimate and permanent element of Viburnum Valley...
https://garden.org/thread/view...