title: Purine and pyrimidine derivatives from the South China Sea gorgonian Subergorgia suberosa.
abstract: Three new purine derivatives, namely, 4-caryboxy-5,6-dihydro-4H,8H-pyrimido[1,2,3-cd]purine-8,10(9H)-dione (1), 7,9-dihydro-1-(3-oxobutyl)-1H-purine-6,8-dione (2), and 7-hydro-9-(3-oxobutyl)-1H-purine-6,8-dione (3) together with six known purine and pyrimidine derivatives were isolated from the EtOH/CH(2)Cl(2) extracts of the South China Sea gorgonian Subergorgia suberosa. The structures of 1-3 were determined on the bases of extensive spectroscopic analysis, including 1D and 2D NMR data.
authors.affiliation: Key Laboratory of Marine Bio-Resourses Sustainable Utilization/Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, The Chinese Academy of Sciences, Guangzhou, Guangdong, PR China. shuhuaqi2001@yahoo.com
authors.forename: Shu-Hua
authors.initials: SH
authors.lastname: Qi
authors.forename: Si
authors.initials: S
authors.lastname: Zhang
authors.forename: Cheng-Hai
authors.initials: CH
authors.lastname: Gao
authors.forename: Qin-Xing
authors.initials: QX
authors.lastname: Li
mesh_terms: D000818:Animals; D037421:Anthozoa / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D011687:Purines / Q000737:chemistry / Q000302:isolation & purification*; D011743:Pyrimidines / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D011687:Purines; D011743:Pyrimidines