Chemical Name:(2aE,2'R,2a1S,4E,5'S,6R,6'R,8E,11R,15S,17aR,20aS)-6'-ethyl-2a1-hydroxy-5',6,8,19-tetramethyl-2a1,3',4',5',6,6',7,10,11,14,15,17a,20,20a-tetradecahydrospiro[2H,17'-11,15-methanofuro[4,3,2-pq][2,6]benzodioxacyclooctadecine-13,2'-pyran]-17,20-dione (as per EP) ; (1'R,2R,4'S,5S,6R,8'R,10'E,13'R,14'E,16'E,20'S,24'S)-6-Ethyl-24'-hydroxy-5,11',13',22'-tetramethyl-3,4,5,6-tetrahydrospiro[pyran-2,6'-[3,7,19]trioxatetracyclo[15.6.1.14,8.020,24]pentacosa[10,14,16,22]tetraene]-2',21'-dione (as per USP)
