Figure 1From: Antiviral effects against EV71 of pimprinine and its derivatives isolated from Streptomyces spChemical structures of pimprinine and its analogues. Pimprinine: R1 = CH3; Pimprinethine: R1 = CH2CH3; WS-30581 A: R1 = CH2CH2CH3; WS-30581 B: R1 = CH2CH2CH2CH3.Back to article page