| Shiratori Pharmaceutical Co., Ltd. Patent applications |
| Patent application number | Title | Published |
|---|
| 20090270619 | METHOD FOR PRODUCING ALPHA FORM CRYSTALS OF SAPROPTERIN HYDROCHLORIDE - A method for selectively producing stable alpha form crystals of sapropterin hydrochloride is provided. In this method, the alpha form crystal of sapropterin hydrochloride is produced by dissolving sapropterin hydrochloride with hydrochloric acid at a concentration of not less than 4 mol/L at not less than 70 degrees C.; adding heated ethanol to the solution; and cooling the solution at a cooling rate of not faster than 3 degrees C./min to a temperature of 40 to 55 degrees C. to precipitate the crystals. | 10-29-2009 |
| 20090076305 | METHOD FOR PRODUCING HYDRAZONE DERIVATIVES - The present invention provides an industrially advantageous process for producing hydrazone derivative represented by the formula (5), which is shown by the following reaction formula. | 03-19-2009 |
