M + 4 stable isotope labeling of levovirin and M + 7 and carbon-14 labeling of levovirin valinate pro-drug

Article abstract of DOI:10.1002/jlcr.1138

[M + 4]-labeled levovirin 5 (231 mg) was synthesized as an MS reference compound from [M + 4] triazole ester 2. [M + 7]-labeled levovirin valinate 6 (127 mg) was synthesized as a comparison MS reference compound from [M + 6] triazole ester 3. [¹⁴