Sparytheplatewithphloroglucinolsolution;thebandsduetocinnamaldehydeando-me-thoxycinnamaldehydeareyellowishbrownandvioletrespectively．Inthedescriptionoftheexperimentalchromatogramwhichofthefollowingiscorrect
A．代表桂皮醛的带为紫色
B．代表O-甲氧基桂皮醛的带为黄棕色
C．代表桂皮醛和O-甲氧基桂皮醛的带为黄棕色至紫色
D．代表O-甲氧基桂皮醛的带为紫色，代表桂皮醛的带为黄棕色
E．以上都不对
