1 63 



Terpenoids and Steroids 



324 Gibberellin A4, C19H04O-,, colorless crystals, m.p. 222° (dec), 

 [a]u'° -20.8° (c 0.34 in methanol). 



CH3 COOH \ 



Gibberella fujikuroi (Saw.) Wollenweber 



Nobutaka Takahashi, Yasuo Seta, Hiroshi Kitamura and 



Yusuke Sumiki, Bull. Agr. Chem. Soc. (Japan) 21 396 



(1957). (Isolation of Gibberellin A,) 



See other references under Gibberellin Ai for structure 



work. 



325 Gibberellin A^ C19H24O6, colorless crystals, m.p. 255-258° 

 (dec), [a]D-'+36°. 



CH3 COOH \ 



CH2 



Gibberella fujikuroi (Saw.) Wollenweber 



Nobutaka Takahashi, Hiroshi Kitamura, Akira Kawarada, 

 Yasuo Seta, Makato Takai, Suburo Tamura and Yusuke Su- 

 miki, Bull. Agr. Chem. Soc. (Japan) 19 267 (1955). (Isola- 

 tion of gibberellins and their properties) 



Nobutaka Takahashi, Yasuo Seta, Hiroshi Kitamura and 

 Yusuke Sumiki, ibid. 23 405 (1959). 



Hiroshi Kitamura, Yasuo Seta, Nobutaka Takahashi, Akira 

 Kawarada and Yusuke Sumiki, ibid. 23 408 (1959). (Struc- 

 tures of the gibberellins) 



Nobutaka Takahashi, Yasuo Seta, Hiroshi Kitamura, Akira 

 Kawarada and Yusuke Sumiki, ibid. 23 493 (1959). (Struc- 

 tures of the gibberellins). 



Yasuo Seta, Nobutaka Takahashi, Hiroshi Kitamura, Ma- 

 kato Tokai, Saburo Tamura and Yusuke Sumiki, ibid. 23 499 

 (1959). (Structures of the gibberellins) 



Nobutaka Takahashi, Yasuo Seta, Hiroshi Kitamura and 

 Yusuke Sumiki, ibid. 23 509 (1959). (Structures of the 

 gibberellins ) 



