Synonyms: Magnesium,tetrakis(methanol)bis[m-[methyl7-chloro-1,2,3,4,4a,5,8,9,14,14a,15,16-dodecahydro-1,6,10,13-tetrahydroxy-18-methyl-4,5,9,14,15-pentaoxo-17aH-8a,16-endo-oxiranonaphtho[2',3':5,6]cyclohepta[1,2-c]xanthene-17a-carboxylato(2-)-O4,O5:O14,O15]]di-,stereoisomer; 2H-8a,16-endo-Oxiranonaphtho[2',3':5,6]cyclohepta[1,2-c]xanthene,magnesium deriv.; Cebetin B; Magnesium, tetrakis(methanol)bis[m-[methyl7-chloro-1,2,3,4,4a,5,8,9,14,14a,15,16-dodecahydro-1,6,10,13-tetrahydroxy-18-methyl-4,5,14,15-tetra(oxo-kO)-9-oxo-17aH-8a,16-endo-oxiranonaphtho[2',3':5,6]cyclohepta[1,2-c]xanthene-17a-carboxylato(2-)]]di-,stereoisomer