Figure 1.

Figure 2.

Figure 3.

Figure 4.
![[A] HPLC chromatogram and [B] amount of compound 1 of total extract and different fractions of M. fluvialis.](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/6471d13c215d2f6c89db1c80/j_fhort-2023-0026_fig_004.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=ASIA6AP2G7AKLED2RARW%2F20260221%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20260221T020336Z&X-Amz-Expires=3600&X-Amz-Security-Token=IQoJb3JpZ2luX2VjENf%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEaDGV1LWNlbnRyYWwtMSJIMEYCIQC71LEj6JHBMRMVRkMOuxEVE4zJWAYYPQt0jdvO1mYKLgIhAOTbHIzNGPgViInVKXS7CfWuQ64j%2FqHJKDZ5Y%2F1UVMDBKsUFCKD%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEQAhoMOTYzMTM0Mjg5OTQwIgypUdV3Rl9rh0zX%2FIAqmQX00mBi%2BgHUpby33nBXAm9zvdzTSmoUzCfp%2BEeuGENGeU8rk7irPUkG28w%2F%2BGCAZGD823tUGBq49kMTdr6FfSxKghjIzxnvxMf00c2JEtGf9i2vJr5Ag9NCEfqKFsCEWEtn3SSbR5wSE4SfQWU9%2BRv3pPU5Yy5Ym4ZfOMMnp%2Fi0CsOCjIMH4DqXyc4Qmu3mx7lNOFPoKCadHXaJxgQRpnvq0AuR6qCkUIqX6OkPb81sGH9SBi6Z%2FSmv9TFJKdsXAACBKR63AjaQPIQFgSInuXESDLDzjf3%2BY5GA%2B3h0qcAGmcAcP0x3NDuvreXqna6wJz6ez1I%2FLstvkJnb0CV6J9MfVQ8nZb1wcPmypdLo6pvi%2FpPa3uAe6FepxTXDtuW2ZQswCV1UmCX8TrY5UcdGJFvpUW%2BRV5m2t1ydMhrSIa%2BpW%2BLTvnYaJ2sBEaBkPjJWbtnQ8Y0tNPyuwHjsxSU1XFmkqBsg%2F4%2FiU1zm6G1ct4BPxXXK%2Bys%2BN%2Bq8NlKT0XR7gAA9CFq%2Fnxh2c9ul304xEp5c9yjsHLp6rRFtfqBmUAUL3DzXe7JPTe27BY%2Fq1vw1eL%2BfcEYcrikaP1VD8hQKEF83FqhqUlXQb52kT3KaLrNFZXhd6sph8rG43JIQVX%2BZS4R2fA00vSvjYSWDJHD8tFtk6fpSuB3ZwM5gNBW6ZciIvUI4AnzipILIZBWzys1iq5%2FMFG7UTwC0FJOo5TWwvu07mgMzi%2FylahFr2gwtcB8rTSdsyVrPLuh3os3b3gNNPrNb2i1fb3h8qs9ydJOZQlDiXr7TLQYZgZGb1xi0JNAKJ8DuCFI3X1IImsRdVbi8EjSbn2MT1WoUjYz927mcjqXma0NGGnubRaU%2F1F76XLszaCMdm%2FnDTujaJzD02OPMBjqwAR3lF67oB033oDCb6FjqxCGZXCcF9b%2Bnd%2Fvj2w8BKnP46TgiXgRdqkbY%2F7VPXoUfTsmDPZkfA8hCkqkRVxM2ModV%2Fg1lcriq27HpGusEh3zIZNeicTLaY2OMYrJU%2BN0l4Qa2fWgAXYvM39erYlS9ygotjAVZVnB73o%2FtyMezb44FU7CApqoZ92oholxkimY%2Ffw2yynWlgMk1LLIV6NgO9OcLjGOdFTJctVQfhn7j%2BTzy&X-Amz-Signature=bf516bafdebb761397ee659c85b82eca1e8f92c7a93c0d04e0e15de403cbb73f&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Supplementary Scheme S1.

Supplementary Figure S1.

Supplementary Figure S2.

Supplementary Figure S3.

Supplementary Figure S4.

Supplementary Figure S5.

Supplementary Figure S6.

α-Glucosidase inhibitory activity of compounds 1–6 from M_ fluvialis_
| Compound | α-Glucosidase inhibitory activity (100 μM) | IC50 (μM) |
|---|---|---|
| 1 | 89.2 ± 3.4 | 14.8 |
| 2 | 53.1 ± 6.3 | 95.2 |
| 3 | 32.8 ± 6.6 | >100 |
| 4 | 24.8 ± 6.5 | >100 |
| 5 | 21.9 ± 0.3 | >100 |
| 6 | 17.0 ± 0.3 | >100 |
| Acarbose* | 76.4 ± 3.4 | 72.5 |