PMC:7556614 / 38324-38924 JSONTXT

{"project":"2_test","denotations":[{"id":"33057878-24350328-28021","span":{"begin":333,"end":335},"obj":"24350328"}],"text":"Acyclovir IR spectrum shows intermolecular and intra-molecular hydrogen-bonded hydroxyl group (O–H) stretchings at 3515 cm−1 and 3470 cm−1 (51), while NH2 symmetrical stretching is at 3438 cm−1 (52). Secondary amine stretching is at 3290 cm−1 (42). A peak at 3177 cm−1 is attributed to N–H stretching overlapped with O–H stretching (47). C–H and H–C–H stretchings are represented at 2927 cm−1 and 2854 cm−1 (42). The presence of C=O at 1708 cm−1, presence of C8–H together with ring vibration of guanine, was shown at 1483 cm−1, while the presence of guanine structure was inferred at 1370 cm−1 (42)."}