Pimarane Diterpenoids from Aerial Parts of Lycopus lucidus and Their Antimicrobial Activity

Table 3

Results of the in vitro antibacterial activity (MIC) of compounds 10–14 against selected Gram-positive and Gram-negative bacteria.

Microorganisms	Minimum inhibitory concentration (µg/mL)
	10	11	12	13	14	Van	Strep
S. aureus (ATCC 9144)	31.25	31.25	62.5	125	125	0.488	—
S. epidermidis (ATCC 12228)	15.62	31.25	125	250	250	0.488	—
P. aeruginosa (ATCC 27853)	62.5	62.5	125	—	—	—	7.812
E. coli (ATCC 14948)	125	250	—	—	—	—	7.812

Van: Vancomycin hydrochloride; Strep: streptomycin sulfate; negative control: 4% DMSO solution did not suppress the growth of the tested bacteria.