Kuntiyong, Punlop; Piboonsrinakara, Nuanpan; Bunrod, Pijitra; Namborisut, Duangkamol; Akkarasamiyo, Sunisa; Songthammawat, Poramate; Hemmara, Chitlada; Buaphan, Artid; Kongkathipb, Boonsong Heterocycles, 2014, vol. 89, # 2 p. 437 - 452 doi: 10.3987/COM-13-12917