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The present invention provides a crystalline form of HPPH (2-((1-n-hexyloxy)ethyl)-2-divinyl-pyropheophorbide-a). The crystalline form can be characterized by an X-ray powder diffraction (XRD) pattern and differential scanning calorimeter (DSC) pattern. The present invention also provides a method for preparing the crystalline form of HPPH.

Zhejiang Hisun Pharmaceutical Co. | Date: 2013-04-01

Provided are several types of ginsenoside polymorphic substances and a method for preparing same. In particular, new crystal form A, crystal form B, crystal form C, crystal form E, crystal form F, crystal form I, crystal form K, crystal form L, crystal form M, crystal form N, and crystal form O are involved.

Zhejiang Hisun Pharmaceutical Co. | Date: 2013-04-02

Provided in the present invention are novel key intermediates of selamectin and the preparation method thereof. Also provided is a new synthesis process, using doramectin as a starting material, and obtaining selamectin via hydrogenation, oxidation, oximation and desugaring. The new process of the present invention has few steps, and is simple to operate, high in yield, low in cost and causes little pollution, and is more suitable for large scale industrial production.

Zhejiang Hisun Pharmaceutical Co. and Shanghai Institute of Pharmaceutical Industry | Date: 2013-04-15

A molecule with neural activities, especially 4-substituent-2-hydroxymorpholin-3-one, as a new intermediate of neurokinin-1 receptor antagonist aprepitant, and preparation method thereof.

Disclosed are a cyanine dye compound and a preparation method therefor, and a dual-function agent for photodynamic therapy and a preparation method therefor. The provided cyanine dye compound is connected to multiple markers, which improves the accuracy of combination of dye and tumor cells, effectively reduces the background value, and avoids excessive residues in the liver. The provided cyanine dye compound is conjugated with the photosensitizer at 2 position, so that tumor highly absorbs the conjugates.

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