Dy. Hu et al., ISOLATION AND STRUCTURE DETERMINATION OF LACCAIC-ACID-F FROM LAC-DYE PRODUCED FROM THAI STICKLAC, Heterocyclic communications, 3(4), 1997, pp. 327-330
A new red pigment, laccaic acid F 6, was isolated from lac-dye produce
d from Thai sticklac and the structure was determined by its chemical
conversions to anthra[2,3-b]benzo-furan derivatives 8 etc.