(1'R,2R,4S,4'S,5S,6R,8'R,10'E,12'S,13'S,14'E,16'E,20'R,21'R,24'S)-4,24'-Dihydroxy-6-isopropyl-21'-methoxy-5,11',13',22'-tetramethyl-2'-oxo-3,4,5,6-tetrahydrospiro[pyran-2,6'-[3,7,19]trioxatetracyclo[1
5.6.1.14,8.020,24]pentacosa[10,14,16,22]tetraen]-12'-yl 2,6-dideoxy-3-O-methyl-α-L-arabino-hexopyranoside