A History of Iron Metabolism in the Mycobacteria - Iron Acquisition by the Genus Mycobacterium - page 15

Fig. 2.4 General structures of the ferric-mycobactins [ 26 , 64 , 67 ]. The substituents at R1 are
usually alkenyl chains with a cis- double bond at C2 (exceptions are for mycobactins M and N,
both from M. marinum ). There are usually a number of chain lengths, only the major ones are
given; † indicates two distinct mycobactins from the same strain, ‡ mycobactins are considered
as being equivalent