Penpan Ganpinyo. (1993) Reactions of 20-hydroxyecdysone with acids and bases. Ramkhamhaeng University,:ม.ป.ท.Penpan Ganpinyo. 1993. Reactions of 20-hydroxyecdysone with acids and bases. ม.ป.ท.:Ramkhamhaeng University,;Penpan Ganpinyo. Reactions of 20-hydroxyecdysone with acids and bases. ม.ป.ท.:Ramkhamhaeng University, 1993. Print.