our essential question:
I
O O O
O
OH H
NH O O OH
OH
O O
O O
1. taxol (paclitaxel)
O
I
W
W
stock value 
new price x investment original price
560 dollars x 1000 dollars  1150 dollars 485 dollars
O
stock value 
new price x investment original price
$21 x $500,000  $525,000 $20
I H OH
O O
O
OH
O
O
H
NH O
O
H O
O
OH
OH
HO H O
O O
O OH O
H
O O
O
O
O
H
O
O OO O
1. taxol (paclitaxel)
N
azadirachtin
O
N
O
O
N
N
OH
O N
N
Co N N
3+
R
N
HO
N
O
O
O
P
O O
O
O O
3. Vitamin B12
N
O
OH O
H O O H O
H
H O
H
OH OH 4. ginsenoside rb2
N O
OH H
OH HO
O N
HO
OH OH
OH OH
O O
OH
HO
I
HO Na O S O O O
OH
HO HO HO
H O
H
OH
HO
H
OH
O H
H O H
O H
H O
O H HO H
H O H
O H O
O
H
H
HO
H O H H
OH OH O O O S O OH Na H O H
H O H H O H H
O H HO H HO
HO HO
O H
O
H
H
O H
H
O H
O
H OH
O
HO
O
H
H OH O H
O
OH H HO
HO
H OH
H OH
HO OH H HO O H HO
H O
O H
O H O H
OH
F
F F
F
H H
C
H
H H
C H
O
H C
H
C H H H H
H
H C C H H O C H H H
O
OH
H
H H C
H
OH
OH
C
OH
C
H
OH
M
Lithium
Sodium
Beryllium
Magnesium
Potassium
Calcium
Rubidium
Strontium
Boron
Aluminum
fluoride
bromide
permanganate
bicarbonate
Chloride
hypochlorite
iodide
chlorite
Cesium
Barium
Francium
Radium
nitrite
perchlorate
Ammonium
Zinc
nitrate
bromate
silver
oxide
sulfide
chromate
dichromate
chlorate
bisulfate
hydroxide
cyanide
iodate
carbonate
sulfite
sulfate
nitride
phosphide
acetate
phosphate
C
O
Br N
H O
Si F Li
O
Na
W
N
+ 1
0 + 2
+ 3
polyvalent
3
- -1 2
F
O
G
D H H N C H H C H H H
and
H H C H N H C H H H
U
O O
+
O
-
I
W
C
r r r r