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          "specific_item_code": "25101",
          "cucop_description": "REACTIVOS ANALITICOS",
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          "specific_item_code": "25101",
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          "description": "GEL LOADING BUFFER MCA: SIGMA- ALDRICH CAT:.G2526-5ML",
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          "unit": "PIEZA",
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          "partida_description": "PRODUCTOS QUÍMICOS BÁSICOS"
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        {
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          "specific_item_code": "25101",
          "cucop_description": "REACTIVOS ANALITICOS",
          "description": "PEPSTATIN A 10 MG MCA: SIGMA ALDRICH CAT: 77170-10 MG",
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          "maximum_quantity": null,
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        {
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          "cucop_code": "25101-0037",
          "specific_item_code": "25101",
          "cucop_description": "REACTIVOS ANALITICOS",
          "description": "SODIUM DODECYL SULFATE (SDS) FCO. DE 500 G. MCA: SIGMA ALDRICH CAT: L3771-500G",
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          "maximum_quantity": null,
          "unit": "PIEZA",
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        {
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          "specific_item_code": "25101",
          "cucop_description": "REACTIVOS ANALITICOS",
          "description": "N,O-DIMETHYLHYDROXYLAMINE HYDROCHLORIDE 98% DE 25 GR. MCA: SIGMA ALDRICH CAT: D163708-25G",
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          "maximum_quantity": null,
          "unit": "PIEZA",
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        {
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        {
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          "cucop_description": "REACTIVOS ANALITICOS",
          "description": "ANHÍDRIDO ACÉTICO, REACTIVO ACS, >=98,0% FCO 1KG. MCA: SIGMA ALDRICH CAT: 242845-1KG",
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          "maximum_quantity": null,
          "unit": "PIEZA",
          "minimum_amount": null,
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        {
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          "cucop_description": "REACTIVOS ANALITICOS",
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          "maximum_quantity": null,
          "unit": "PIEZA",
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          "partida_code": "25101",
          "partida_description": "PRODUCTOS QUÍMICOS BÁSICOS"
        },
        {
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          "cucop_code": "25101-0037",
          "specific_item_code": "25101",
          "cucop_description": "REACTIVOS ANALITICOS",
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          "maximum_quantity": null,
          "unit": "PIEZA",
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          "partida_code": "25101",
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        {
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          "specific_item_code": "25101",
          "cucop_description": "REACTIVOS ANALITICOS",
          "description": "GEL DE SÍLICE PARA CROMATOGRAFIA EN CAPA FINA GF 254 CON INDICADOR FLUORESCENTE 1KG. MCA: SIGMA CAT: 60765-1KG.",
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          "maximum_quantity": null,
          "unit": "PIEZA",
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        {
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          "cucop_description": "REACTIVOS ANALITICOS",
          "description": "PROPYLPHOSPHONIC ANHYDRIDE SOLUTION =50 WT. % IN ETHYL ACETATE. 100ML. MCA: SIGMA ALDRICH CAT: 431303-100ML",
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          "unit": "PIEZA",
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