在给出的﹣2$\frac{1}{3}$，9，0.01，﹣2013，0，$\frac{22}{7}$这些数中，负有理数的个数是____ ．

For Children
Museum:   Children’s Museum, Sundays, 89 North Street, 67641235
Story time: Children’s Library, 106 Green Street, Wednesdays during 9:30 a.m -5:00p.m. 66599624
Sports:     Football Club, Tuesdays and Thursdays, 16 Yangtze Road, 96725643
Basketball Club, Wednesdays and Fridays, 79071632
Cinema:    New films for children, 99 Brick Road, 69001354
Useful Phone Numbers
Fast Food Restaurant: 66387901
Hospital: 68787451
Visitor Information Center: 800-120-9847
Taxi: 79210583
Visitor Hotel(宾馆) Information: 800-739-7302

I．已知龙胆酸甲酯结构如图所示．