Tab. 4.

π–π Interaction energies for intercalators with guanine-cytosine base pair.

Compounds	E (kcal/mol)
	Orientation 1	Orientation 2	Average
Caffeine	−17.3	−22.1	−19.7
Berberine	−30.9	−29.4	−30.2
Camptothecin	−25.4	−22.3	−23.9
Chelerythrine	−25.5	−30.6	−28.0
Doxorubicin	−29.1	−31.6	−30.3
Ellipticine	−20.3	−20.8	−20.5
Sanguinarine	−28.3	−30.3	−29.3