Magaly Resto-Roldán, magalyresto@gmail.com1, Nadia Martínez-Villegas Jr.2, and Carmen Enid Martínez2. (1) Department of Chemistry, University of Puerto Rico - Rio Piedras Campus, P.O Box 23346, San Juan, PR 00931-3346, (2) Department of Crop and Soil Sciences, The Pennsylvania State University