In vitro cytotoxicity and structure-activity relationship approaches of entkaurenoic acid derivatives against human breast carcinoma cell line Author da Costa, Ricardo M. ∗∗ & ∗ & Núcleo de Pesquisa em Ciências Exatas e Tecnológicas da Universidade de Franca - UNIFRAN, Franca, SP, Brazil & Informática Aplicada às Ciências - IFSULDEMINAS, Muzambinho, MG, Brazil Author Bastos, Jairo K. Author Costa, Maria C. A. Author Ferreira, Márcia M. C. Author Mizuno, Cássia S. Author Caramori, Giovanni F. Author Nagurniak, Gláucio R. Author Simão, Marília R. Author dos Santos, Raquel A. Author Veneziani, Rodrigo C. S. Author Ambrósio, Sérgio R. Author Parreira, Renato L. T. text Phytochemistry 2018 2018-10-12 156 214 223 http://dx.doi.org/10.1016/j.phytochem.2018.10.005 journal article 10.1016/j.phytochem.2018.10.005 1873-3700 10484535

Table 2 Results of statistical parameters and predicted values obtained for the test set.

Compounds	p IC (mol L −1) 50obs	p IC (mol L −1) 50pred	Residues	ARE (%)a pred
a Average relative error of prediction. b coefficient of determination for external validation. c Standard error of prediction.
23	4.1773	3.9372	0.240	6.40
24	4.1674	4.2059	−0.038
25	4.0253	3.7676	0.257
10	3.8193	3.4309	0.388
15	3.5403	3.2286	0.311
27	–	4.4997	–
R 2 b pred	0.8945
SEP c	0.2733