1868 H. Watts V. 655 Taiguic acid..occurs in the cold alcoholic extract of taigu wood.
1892 H. F. Morley & M. M. P. Muir (rev. ed.) III. 119 Lapachic acid, C15H14O3; Oxy-amenyl-naphtho-quinone; Taiguic acid..a yellow colouring matter present in the ‘lapacho’ wood of a genus of the Bignoniaceæ.