title: Inhibition of DNA topoisomerases I and II and cytotoxicity of compounds from Ulmus davidiana var. japonica.
authors.affiliation: College of Pharmacy, Yeungnam University, Gyongsan, 712-749, Korea.
authors.forename: Ming Shan
authors.initials: MS
authors.lastname: Zheng
authors.forename: Yeun-Kyung
authors.initials: YK
authors.lastname: Lee
authors.forename: Ying
authors.initials: Y
authors.lastname: Li
authors.forename: Kyoung
authors.initials: K
authors.lastname: Hwangbo
authors.forename: Chong-Soon
authors.initials: CS
authors.lastname: Lee
authors.forename: Jae-Ryong
authors.initials: JR
authors.lastname: Kim
authors.forename: Sunny Kyung-Seon
authors.initials: SK
authors.lastname: Lee
authors.forename: Hyun-Wook
authors.initials: HW
authors.lastname: Chang
authors.forename: Jong-Keun
authors.initials: JK
authors.lastname: Son