Answer
August Kekulé, a prominent chemist, significantly influenced Otto Wallach's work. Kekulé's groundbreaking research on the structure of benzene and his proposal of the Kekulé structure had a profound impact on Wallach's understanding of organic chemistry. Wallach's subsequent investigations into terpenes and essential oils were inspired by Kekulé's theories, leading to his groundbreaking contributions to the field of terpene chemistry.