i6i Terpenoids and Steroids 



Lactaiius deliciosiis L. 



Harry Willstaedt and B. Zetterberg, Svensk Kem. Tidskr. 58 

 306 (1946). 



PI. A. Plattner, E. Heilbronner, R. W. Schmid. R. Sandrin 

 and A. Furst, Chem. and Ind., 1202 (1954). (Structure) 



E. Heilbronner and R. W. Schmid, Helv. Chim. Acta 37 

 2018 (1954). 



320 Lactarazulene, C15H16, blue liquid, b.p. 155-160° (2.5-3 mm.). 



Lactariiis deliciosiis L. 



Occurs together with iactaroviolin (q.v. ) and a green 

 321 crystalline compound, Verdazulene, C15H16, m.p. 90°. 



Frantisek Sorm, Vera Benesova and Vlastimil Herout, Chem. 

 Listij 47 1856 (1953). (Structure) 



Gibberellins and Gibberellenic Acid 



Although gibberellic acid is the gibberellin produced in 

 highest yield by Gibberella fujikuroi, three minor gibber- 

 eUins are produced also, and the crude mixture is com- 

 monly isolated. The minor gibberellins are called A■^, A2 

 and A4, gibberelhc acid being A3. (It also has been called 

 gibberellin X.) Their structures are similar to those of 

 gibberellic acid. 



Gibberellin A^ has been found in plants as well as in 

 fungi. All of the four gibberellins show plant hormone 

 activity. A fifth, inactive, compound called gibberellenic 

 acid has been isolated recently. It may be an artifact. 



A structure for gibberellic acid was advanced in 1956 

 by an English group. Structure work has continued in 

 Japan, where the gibberellins were originally isolated, and 

 recently structures for all the gibberellins have been pub- 

 Ushed which differ somewhat from the one first advanced 

 in England. Even more recently a third set of structures, 

 complete with stereochemistry, has been proposed by the 

 English school. It is these structures which are shown 

 here. 



