Chapter 18.4, Problem 18.6P

Decaffeinated coffee is produced by extracting the caffeine from coffee with a solvent. Initially dichloromethane $\left({\text{CH}}_{\text{2}}{\text{Cl}}_{\text{2}}\right)$ was used, but concerns arose over the ill health effects of trace amounts of ${\text{CH}}_{\text{2}}{\text{Cl}}_{\text{2}}$ remaining in the coffee. Why is caffeine soluble in ${\text{CH}}_{\text{2}}{\text{Cl}}_{\text{2}}$ ?