1. Department of Chemistry, University of Puerto Rico, Río Piedras, San Juan, Puerto Rico 00931, United States
2. Crystallization Design Institute and the Molecular Sciences Research Center Inc., University of Puerto Rico, San Juan, Puerto Rico 00926, United States
3. Department of Chemistry and the Molecular Design Institute, New York University, 100 Washington Square East, New York, New York 10003-6688, United States
4. Department of Biology, University of Puerto Rico, Río Piedras, San Juan, Puerto Rico 00931, United States