Quantum Mechanical Spectral Analysis and Aldose Reductase Inhibition Evaluation of Synthetic New Pyrrolopyrazinones - Yun-Seo Kil; Junhyeung Park; Byeong-Seon Jeong; Punam Thapa; Young Jun Ok; Hyukjae Choi; Jee-Heon Jeong; Joo-Won Nam (ACS Omega)