(7R,9R)-9-acetyl-7-[(2S,4S,5S,6S)-4-amino-5-hydroxy-6-methyloxan-2-yl]oxy-6,9,11-trihydroxy-4-methoxy-8,10-dihydro-7H-tetracene-5,12-dione 、
乙酰丙酮 生成 (7R,9R)-9-acetyl-6,9,11-trihydroxy-7-[(2S,4S,5S,6S)-5-hydroxy-6-methyl-4-[[(E)-4-oxopent-2-en-2-yl]amino]oxan-2-yl]oxy-4-methoxy-8,10-dihydro-7H-tetracene-5,12-dione