Y Wang, H Bernsmann, M Gruner, P Metz - Tetrahedron Letters, 2001 - Elsevier
… To our disappointment, only 2-epi-pamamycin-607 (11) 11 and 2,2′-bisepi-pamamycin-607
(12) 12 were isolated in 28 and 17% yields, respectively, after mixed anhydride activation …