Search Results
138 C₇H₆O₃ 137, 109, 93 Salicylic acid Phenolic acids
fragment ion m/z 177.0187 [M−H−C 6 H 6 O] − and m/z 151.0054 [M−H−C 8 H 8 O] − , the latter was further cleaved to produce −MS 3 fragment ion m/z 133.0277 [M−H−C 8 H 8 O−H 2 O] − and −MS 2 fragment ion m/z 125.0267 [M−H−C 8 H 8 O−CO] − , −MS 3
at m/z 551.75, 578.10, and 527.75 due to [M–C 2 H 5 N–CH 3 –H] + , [M–OCH 3 ] + and [M–2C 2 H 6 N 2 ] + respectively. Furthermore, fragments were observed at 499.65 and 465.00 due to the loss of two and one CH 3 radical. The ion at m/z 188 was
.045 [M−H] − Aromaticity 32 Gallic acid C 7 H 6 O 5 LNTHITQWFMADLM-UHFFFAOYSA-N 2.77 169.0144344 169.014 [M−H] − Phenols 33 Cryptochlorogenic acid C 16 H 18 O 9 GYFFKZTYYAFCTR-AVXJPILUSA-N 3.16 353.0880346 353.088 [M−H] − Phenylpropanoids 34 2
( Figure 1 D). Positive ESI–MS ( m / z ): [M + H] + 127.2, [M + Na] + 149.2. 1 H-NMR (CDCl 3 , 400 MHz): δ 9.59 (1H, s, CHO), 7.24 (1H, d, J = 4.0 Hz, H-3), 6.53 (1H, d, J = 4.0 Hz, H-4), 4.73 (2H, s, H-6) ( Figure 5 A). 13 C-NMR (CDCl 3 , 125 MHz
.3 MRT (0– t ) h 4.4 ± 0.2 2.4 ± 0.7 MRT (0-∞) h 6.6 ± 1.8 3.7 ± 1
used in Ozenoxacin Cream 1% w/w, as an anti-microbial preservative. Benzoic Acid appears as a white crystalline solid, has a molecular formula of C 7 H 6 O 2 , has a molecular weight of 122.12 g mol −1 and structure [ 12 ] is as shown in Fig. 1 (b
.67 4.12 8 h 6,052.3 1.41 0
.648 * T max h 6 8 CLz
(Ⅰ): 3′,4′,5,6,7,8-Hexamethoxyflavone (HM), C 21 H 22 O 8 , yellowish-white powder; EI-MS, m/z 403.05 [M+H] + . 1 HNMR(500 MHz, CDCl 3 ): δ (ppm): 7.40 (1H, d, J =2.1 Hz, H-2′), 6.98 (1H,d, J =8.5 Hz, H-5′), 7.56 (1H, dd, J = 2.1, 8.5 Hz, H-6
