(1′R,2R,4Z,4′S,5S,8′R,10′E,13′R,14′E,16′E,20′R,21′R,24′S)-21′,24′-Dihydroxy-4-(methoxyimino)-5,11′,13′,22′-tetramethyl-6-[(2E)-4-methyl-2-penten-2-yl]-3,4,5,6-tetrahydro-2′H-spiro[pyran-2,6′-[3,7,19]t rioxatetracyclo[15.6.1.1~4,8~.0~20,24~]pentacosa[10,14,16,22]tetraen]-2′-one

(1′R,2R,4Z,4′S,5S,8′R,10′E,13′R,14′E,16′E,20′R,21′R,24′S)-21′,24′-Dihydroxy-4-(methoxyimino)-5,11′,13′,22′-tetramethyl-6-[(2E)-4-methyl-2-penten-2-yl]-3,4,5,6-tetrahydro-2′H-spiro[pyran-2,6′-[3,7,19]t rioxatetracyclo[15.6.1.1~4,8~.0~20,24~]pentacosa[10,14,16,22]tetraen]-2′-one

(1R,4S,4′Z,5′S,6R,8R,10E,13R,14E,16E,20R,21R,24S)-21,24-Dihydroxy-4′-methoxyimino-5′,11,13,22-tetramethyl-6′-[(E)-4-methylpent-2-en-2-yl]spiro[3,7,19-trioxatetracyclo[15.6.1.14,8.020,24]pentacosa-10,14,16,22-tetraene-6,2′-oxane]-2-one