diff --git a/input/fsh/structuredefinition/quantity.fsh b/input/fsh/structuredefinition/quantity.fsh
index 6d2da60..8e8fce3 100644
--- a/input/fsh/structuredefinition/quantity.fsh
+++ b/input/fsh/structuredefinition/quantity.fsh
@@ -12,7 +12,7 @@ RuleSet: quantity-ruleset
 // Amount Quantity
 // =====================================================================================
 Profile: CHEMEDEPRAmountQuantity
-Parent: CHEMEDQuantityWithEmedUnits
+Parent: CHCoreQuantityWithEmedUnits
 Id: ch-emed-epr-amount-quantity
 Title: "Amount Quantity"
 Description: "A quantity with an amount unit (no time unit)"
@@ -30,7 +30,7 @@ Severity: #warning
 // Time Quantity
 // =====================================================================================
 Profile: CHEMEDEPRTimeQuantity
-Parent: CHEMEDQuantityWithEmedUnits
+Parent: CHCoreQuantityWithEmedUnits
 Id: ch-emed-epr-time-quantity
 Title: "Time Quantity"
 Description: "A quantity with a time unit (a duration)"
diff --git a/input/fsh/structuredefinition/range.fsh b/input/fsh/structuredefinition/range.fsh
index fb1fd00..c7481de 100644
--- a/input/fsh/structuredefinition/range.fsh
+++ b/input/fsh/structuredefinition/range.fsh
@@ -7,7 +7,7 @@ RuleSet: range-ruleset
 // Amount Quantity Range
 // =====================================================================================
 Profile: CHEMEDEPRAmountRange
-Parent: CHEMEDRangeWithEmedUnits
+Parent: CHCoreRangeWithEmedUnits
 Id: ch-emed-epr-amount-range
 Title: "Amount Range"
 Description: "A range of amount quantities"
diff --git a/input/fsh/structuredefinition/ratio.fsh b/input/fsh/structuredefinition/ratio.fsh
index fad1f43..60893a3 100644
--- a/input/fsh/structuredefinition/ratio.fsh
+++ b/input/fsh/structuredefinition/ratio.fsh
@@ -7,7 +7,7 @@ RuleSet: ratio-ruleset
 // Quantity Ratio (Amount / Amount)
 // =====================================================================================
 Profile: CHEMEDEPRRatioAmountPerAmount
-Parent: CHEMEDRatioWithEmedUnits
+Parent: CHCoreRatioWithEmedUnits
 Id: ch-emed-epr-ratio-amount-per-amount
 Title: "Ratio (Amount / Amount)"
 Description: "A ratio of amount per amount"
@@ -21,7 +21,7 @@ Description: "A ratio of amount per amount"
 // Quantity Ratio (Amount / Time)
 // =====================================================================================
 Profile: CHEMEDEPRRatioAmountPerTime
-Parent: CHEMEDRatioWithEmedUnits
+Parent: CHCoreRatioWithEmedUnits
 Id: ch-emed-epr-ratio-amount-per-time
 Title: "Ratio (Amount / Time)"
 Description: "A ratio of amount per time"