Table 1.

General structure and physical properties of the tested IA derivatives^a

IA derivative	R1,2	R3	R4	R5	Absorption (λmax) (nm)	Emission (λmax) (nm)
C1310	Et	OH	H	Me	428	534
C1311	Et	OH	H	H	420	524
C1330	Et	OMe	H	H	423	524
C1371	Me	OH	H	H	429	533
C1375	Me	OMe	H	Me	436	553
C1379	Et	OMe	H	Me	437	554
C1415	Et	H	H	H	420	520
C1419	Et	H	OH	H	409	483
C1492	Me	OH	H	H	439	534
C1558	Et	t-Butyl	H	H	421	518

^aBased on data by Dziegielewski et al. (5). Shading indicates the compounds most active in photodynamic inactivation of C. albicans. Et, CH₂CH₃; Me, CH₃; OMe, OCH₃.