0120-2804 0120-2804 S0120-28042020000200018 10.15446/rev.colomb.quim.v49n2.78347 Costa Rica Costa Rica 00 08 2020 00 08 2020 49 2 18 22

[1] 2017 2 3 3 1-16 [2] 2007 31 1 1 113-9 [3] 2015 20 3 3 181 [4] 2005 33 3 3 233-43 [5] 2010 285 10 10 7722-38 [6] 2008 283 50 50 34650-9 [7] 1973 81-226 [8] 1993 21 [9] 2013 5 4 4 286-91 [10] 2018 18 1 1 47-56 [11] 2010 5 1 1 70-4 [12] 2015 6 4 4 521-5529 [13] 2017 11 1 1 281-9 [14] 2011 911-22 [15] 2010 38 2 2 160-8 [16] 2018 117 34-40 [17] 1994 245 245 17 [18] 2011 39 3 3 232-5 [19] 2017 10 22 22 60-8 [20] 2018 4 4 4 1-40