TY  - JOUR 
T1  - Sample optimization for rapid identification of nucleosides and bases from ascidian extracts using ESI-MS/MS
JO  - Journal of the Brazilian Chemical Society
A1  - Takeara, Renata
A1  - Jimenez, Paula C.
A1  - Costa-Lotufo, Letícia V.
A1  - Lopes, João L. C.
A1  - Lopes, Norberto P.
SN  - 0103-5053
UL  - 10.1590/S0103-50532007000500027
VL  - 18 
Y1  - 2007
PB  - Brasil 
ER  -