Examine the twelve structural formulas shown at the bottom of this page, and select those that satisfy each of the following conditions. Enter one or more letters ( A through L ) in each answer box, reflecting your choice for each.
Do not enter superfluous characters, since they will be counted as incorrect answers.
A |
B |
C |
D |
E |
F |
G |
H |
I |
J |
K |
L |