Compound 6
From the following article
Structural basis for macrolactonization by the pikromycin thioesterase
David L Akey, Jeffrey D Kittendorf, John W Giraldes, Robert A Fecik, David H Sherman & Janet L Smith
Nature Chemical Biology 2, 537-542 (2006) Published online: 10 September 2006
doi:10.1038/nchembio824

Compound 6
(2R,3S,4S,6R,7R/S,10R,11R,8E)-S-2-Ethanamidoethyl 3,7,11-trihydroxy-2,4,6,10-tetramethyltridec-8-enethioate
