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awk to print unique text in field before hyphen

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# 1  
Old 12-21-2015
awk to print unique text in field before hyphen
Trying to print the unique values in $2 before the -, currently the count is displayed. Hopefully, the below is close. Thank you Smilie.

file
Code:
chr2:46603668-46603902 EPAS1-902|gc=54.3 253.1
chr2:211471445-211471675 CPS1-1205|gc=48.3 264.7
chr19:15291762-15291983 NOTCH3-1003|gc=68.8 195.8
chr2:211460199-211460318 CPS1-1200|gc=41.2 105.6

Code:
awk '{sub(/\-.*/,"",$2)}!seen[$2]++{c++}END{print c}' file.txt

output is 3

desired output
Code:
EPAS1
CPS1
NOTCH3

# 2  
Old 12-21-2015
Perhaps?
Code:
awk '{split($2, a, "-")}!seen[a[1]]++{print a[1]}' file.txt

This User Gave Thanks to Aia For This Post:
cmccabe
# 3  
Old 12-21-2015
works great.... thank you Smilie.
# 4  
Old 12-22-2015
Code:
$ awk -F'[- ]' ' !a[$3]++ { print $3 } ' file
EPAS1
CPS1
NOTCH3

These 2 Users Gave Thanks to anbu23 For This Post:
Don Cragun looney
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