... Content. Citation Only; Citation and Abstract; Advanced search. Other users also viewed these articles. Opens document download manager. Do not show again. ... Please enable JavaScript to use all the features on this page. Bioorganic & Medicinal Chemistry Letters. Volume 13, Issue 3, 10 February 2003, Pages 321–325. ... References. 1; Rosenberg, E. US Patent 3973005, 1976. 2; K Gerth, H Irschik, H Reichenbach, W Trowitzsch; J. Antibiot., 35 (1982), p. 1454. ...