0001019687-09-001658 8-K 2 20090504 4.01 9.01 20090508 20090508 ALLEGRO BIODIESEL CORP 0000895380 2860 205748331 DE 1231 8-K 34 000-21982 09809997 6033 W. CENTURY BLVD SUITE 1090 LOS ANGELES CA 90045 3106702093 6033 W. CENTURY BLVD SUITE 1090 LOS ANGELES CA 90045 DIAMETRICS MEDICAL INC 19930624 8-K 1 allegro_8k-050409.htm CURRENT REPORT ON FORM 8-K EX-16.1 2 allegro_8k-ex1601.htm LETTER ON CHANGE IN CERTIFYING ACCOUNTANT