 He co-discovered the Eschenmoser fragmentation, thus sometimes referred to "Eschenmoser–Ohloff" fragmentation.His small but condensed "magnum opus" on the chemistry of odorants ""Riechstoffe und Geruchssinn.Die molekulare Welt der Düfte"" was republished in English in 2011, completely revised and much extended by Wilhelm Pickenhagen and Philip Kraft, as ""Scent and Chemistry – The Molecular World of Odors"".