escaping double-quotes in varchar array

psql (11.5, server 11.3) on linux
Trying to insert a string containing a double-quote into a varchar arr.
Here's my attempt

dvdb=# create table testarr (arr varchar[]);
CREATE TABLE
dvdb=# insert into testarr (arr) values ('{"abcdefg"}');
INSERT 0 1
dvdb=# select * from testarr;
arr
-----------
{abcdefg}
(1 row)

dvdb=# insert into testarr (arr) values ('{"hijk"lmnop"}');
ERROR: malformed array literal: "{"hijk"lmnop"}"
LINE 1: insert into testarr (arr) values ('{"hijk"lmnop"}');
^
DETAIL: Unexpected array element.
dvdb=# insert into testarr (arr) values ('{"hijk""lmnop"}');
ERROR: malformed array literal: "{"hijk""lmnop"}"
LINE 1: insert into testarr (arr) values ('{"hijk""lmnop"}');
^
DETAIL: Unexpected array element.
dvdb=# insert into testarr (arr) values ('{"hijk\"lmnop"}');
INSERT 0 1
dvdb=# select * from testarr;
arr
-----------------
{abcdefg}
{"hijk\"lmnop"}
(2 rows)

What I'm looking for is...

{abcdefg}
{hijk"lmnop}

Can this be done ?