Savithri Dhanalekshmi Yao, Z., Bhaumik, J., Dhanalekshmi, S., Ptaszek, M., Rodriguez, P. A., & Lindsey, J. S. (2007). Synthesis of porphyrins bearing 1-4 hydroxymethyl groups and other one-carbon oxygenic substituents in distinct patterns. TETRAHEDRON, 63(43), 10657–10670. https://doi.org/10.1016/j.tet.2007.07.108 Lindsey, J. S., Dhanalekshmi, S., Laha, J. K., & Taniguchi, M. (2006). Scalable synthesis of dipyrromethanes. Washington, DC: U.S. Patent and Trademark Office. Fan, D. Z., Taniguchi, M., Yao, Z., Dhanalekshmi, S., & Lindsey, J. S. (2005). 1,9-bis(N,N-dimethylaminomethyl)dipyrromethanes in the synthesis of porphyrins bearing one or two meso substituents. TETRAHEDRON, 61(43), 10291–10302. https://doi.org/10.1016/j.tet.2005.08.028 Laha, J. K., Dhanalekshmi, S., Taniguchi, M., Ambroise, A., & Lindsey, J. S. (2003). A scalable synthesis of meso-substituted dipyrromethanes. ORGANIC PROCESS RESEARCH & DEVELOPMENT, 7(6), 799–812. https://doi.org/10.1021/op034083q