Anti-allergic principles from Thai zedoary: structural requirements of curcuminoids for inhibition of degranulation and effect on the release of TNF-alpha and IL-4 in RBL-2H3 cells. - Matsuda,H.; Tewtrakul,S.; Morikawa,T.; Nakamura,A.; Yoshikawa,M. (Bioorg Med Chem, 2004)