0000927016-99-002693 S-3 5 19990727 BOSTON PROPERTIES INC 0001037540 6500 042473675 DE 1231 S-3 33 333-83869 99671260 800 BOYLSTON STREET SUITE 400 BOSTON MA 02199 6172363300 800 BOYLSTON STREET SUITE 400 BOSTON MA 02199 S-3 1 000092701699002693-001-seq1-s-3.txt FORM S-3 EX-5.1 2 000092701699002693-002-seq2-ex-5-1.txt OPINION OF GOODWIN, PROCTER & HOAR EX-8.1 3 000092701699002693-003-seq3-ex-8-1.txt OPINION OF GOODWIN, PROCTER & HOAR EX-23.1 4 000092701699002693-004-seq4-ex-23-1.txt CONSENT OF PRICEWATERHOUSECOOPERS LLP EX-99.1 5 000092701699002693-005-seq5-ex-99-1.txt REGISTRATION RIGHTS AGREEMENT