Table 2. Relative Energies (kcal/mol) of Stationary Point Structures of Intramolecular Proton-Transfer Reaction in Fujikurin A and B Obtained by Several Methods.

	Fujikurin A			Fujikurin B
method	EQ(1)	TS	EQ(2)	EQ(1)	TS	EQ(2)
CAM-B3LYP/6-311+G**	0.0	1.4	0.2	0.0	2.3	1.7
MP2/aug-cc-pVDZ//CAM-B3LYP/6-311+G**	0.0	1.4	–0.2	0.0	2.2	1.4
PM6-D3H4	0.0	2.8	1.7	0.0	3.7	2.9