1821 A. Ure at Picrotoxia It may therefore be regarded as a vegeto-alkali itself.
1855 (Royal Soc.) 145 211 The beautiful fluorescence exhibited by a solution of the inner bark of the horse-chestnut is due to the presence of the vegeto-alkali æsculine in a free state.
1918 W. M. Barr I. iv. 201 It [sc. alcohol] dissolves many organic substances, such as the vegeto-alkalies, resins, essential oils and various other bodies.