diff --git a/eoreader/reader.py b/eoreader/reader.py
index cb3783e2..24ee3235 100644
--- a/eoreader/reader.py
+++ b/eoreader/reader.py
@@ -211,7 +211,6 @@ class Constellation(ListEnum):
     Constellation.S2: r"S2[AB]_MSIL(1C|2A)_\d{8}T\d{6}_N\d{4}_R\d{3}_T\d{2}\w{3}_\d{8}T\d{6}",
     # Element84 : S2A_31UDQ_20230714_0_L2A, Sinergise: 0 or 1...
     Constellation.S2_E84: r"S2[AB]_\d{2}\w{3}_\d{8}_\d_L(1C|2A)",
-    Constellation.S2_SIN: r"\d",
     Constellation.S2_THEIA: r"SENTINEL2[AB]_\d{8}-\d{6}-\d{3}_L(2A|1C)_T\d{2}\w{3}_[CDH](_V\d-\d|)",
     Constellation.S3_OLCI: r"S3[AB]_OL_[012]_\w{6}_\d{8}T\d{6}_\d{8}T\d{6}_\d{8}T\d{6}_\w{17}_\w{3}_[OFDR]_(NR|ST|NT)_\d{3}",
     Constellation.S3_SLSTR: r"S3[AB]_SL_[012]_\w{6}_\d{8}T\d{6}_\d{8}T\d{6}_\d{8}T\d{6}_\w{17}_\w{3}_[OFDR]_(NR|ST|NT)_\d{3}",
@@ -266,6 +265,7 @@ class Constellation(ListEnum):
     ],
     Constellation.HLS: r"HLS\.[LS]30\.T\d{2}\w{3}\.\d{7}T\d{6}\.v2\.0",
     Constellation.GS2: r"DE2_(PM4|PSH|PS3|PS4|MS4|PAN)_L1[A-D]_\d{6}_\d{8}T\d{6}_\d{8}T\d{6}_DE2_\d{5}_.{4}",
+    Constellation.S2_SIN: [r"\d", r"B12\.jp2"],
 }
 
 MTD_REGEX = {
@@ -276,13 +276,6 @@ class Constellation(ListEnum):
     },
     Constellation.S2: {"nested": 3, "regex": r"MTD_TL.xml"},
     Constellation.S2_E84: rf"{CONSTELLATION_REGEX[Constellation.S2_E84]}\.json",
-    Constellation.S2_SIN: {
-        "nested": -1,  # File that can be found at any level (product/**/file)
-        "regex": [
-            r"metadata\.xml",  # Too generic name, check also a band
-            r"B12\.jp2",
-        ],
-    },
     Constellation.S2_THEIA: rf"{CONSTELLATION_REGEX[Constellation.S2_THEIA]}_MTD_ALL\.xml",
     Constellation.S3_OLCI: r"Oa\d{2}_radiance.nc",
     Constellation.S3_SLSTR: r"S\d_radiance_an.nc",
@@ -361,6 +354,13 @@ class Constellation(ListEnum):
             r"IMAGERY\.TIF",
         ],
     },
+    Constellation.S2_SIN: {
+        "nested": 1,  # File that can be found at any level (product/**/file)
+        "regex": [
+            r"metadata\.xml",  # Too generic name, check also a band
+            r"B12\.jp2",
+        ],
+    },
 }