boos
e0a5f57793
Vendor the rebranded BoosAPI Desktop client (Tauri + Vue) into metapi as a monorepo subdirectory under desktop/. Source only — node_modules, dist, Cargo target and the upstream .git history are excluded. desktop/ keeps its own independent Cargo workspace (desktop/src-tauri with crates/*); it is not part of the backend boosapi crate, so a `cargo check` at the metapi root still compiles only the backend. Build the desktop app from desktop/src-tauri per desktop/README.md. Note: app icons are still placeholder assets pending the final BoosAPI logo. The updater signing keys live outside the repo and are not included.
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Assessing Translation Needs\n\n\n\n
I've begun by dissecting the core requirements of this translation task. My focus is on synthesizing the Chinese structural elucidation paragraph into a concise, SCI-paper-ready English version. The expert role helps me tailor the language appropriately, and I'm aware of the final format requirements. Next, I need to understand the nuances of the Chinese text.
Evaluating Initial Approaches
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My current thinking revolves around the initial approach to this translation. I'm prioritizing accuracy, which means a deep dive into the source text to extract the core scientific meaning. I plan to use my expertise to identify key terms and phrasing to ensure the English version is clear and meets journal standards. Considering Compound 3 requires specialized knowledge.
Here is the translation of the structural elucidation for Compound 3, following standard SCI journal formatting and terminology.Compound 3 was obtained as a white powder with an optical rotation of [\\alpha]^{25}_{\\text{D}} –76.7 (c 0.1, MeOH). Its high-resolution electrospray ionization mass spectrometry (HR-ESI-MS) exhibited a deprotonated molecular ion peak at m/z 339.0726 [M–H]^– (calcd for C${15}$H${15}$O$9$^–, 339.0722), establishing the molecular formula as C${15}$H$_{16}$O$_9$, corresponding to eight degrees of unsaturation.
Analysis of the $^{1}$H and $^{13}$C NMR data (Table 3) revealed characteristic signals at \\delta_{\\text{H}} 7.12 (2H, s, H-2$'/6'$) and \\delta_{\\text{C}} 167.7 (C-7$'$), 146.4 (2C, C-3$'/5'$), 139.9 (C-4$'$), 121.4 (C-1$'$), and 110.4 (2C, C-2$'/6'$), clearly indicating the presence of a galloyl moiety. Additionally, signals at \\delta_{\\text{H}} 3.75 (3H, s, –OCH$_3$) and \\delta_{\\text{C}} 52.5 (–OCH$_3$) confirmed the existence of a methoxy group.
To precisely elucidate the structure, the NMR data of 3 were compared with those of the known compound 5-$O$-galloyl-(–)-shikimic acid [Reference]. The spectra showed high similarity in both the galloyl moiety and the shikimic acid skeleton, with chemical shifts and coupling patterns matching well with the reference. Notably, the H-5 proton signal of 3 at \\delta_{\\text{H}} 5.75 (1H, br s) was significantly downfield shifted, consistent with the deshielding effect observed in 5-$O$-galloyl-(–)-shikimic acid. This strongly supported the attachment of the galloyl group to the C-5 hydroxyl of the shikimic acid unit via an ester linkage. The primary structural difference between 3 and 5-$O$-galloyl-(–)-shikimic acid was located at C-7. In the HMBC spectrum (Fig. 2), a distinct correlation between the methoxy protons at \\delta_{\\text{H}} 3.75 and the C-7 carbonyl carbon of the shikimate core at \\delta_{\\text{C}} 168.3 confirmed that the C-7 carboxyl group was methylated to form a methyl ester.
The NOESY spectrum (Fig. 2) exhibited correlations of H-4 (\\delta_{\\text{H}} 4.00) with H-2a (\\delta_{\\text{H}} 2.32) and H-5 (\\delta_{\\text{H}} 5.75), as well as H-3 (\\delta_{\\text{H}} 4.12) with H-2b (\\delta_{\\text{H}} 2.79). These correlations indicated that H-3 is cis-oriented relative to the 4-OH and 5-OH groups. The absolute configuration was further determined as (3$R$, 4$S$, 5$R$) by calculated electronic circular dichroism (ECD) analysis (Fig. 4).
Based on the comprehensive spectroscopic analysis and comparison with 5-$O$-galloyl-(–)-shikimic acid, the structure of 3 was identified as methyl 5-$O$-galloyl-(–)-shikimate.